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Laptop screen is black

Message #1 - Posted 2005/02/02 - raine1967

Hi. I have and old blue iBook, G3. I used it primarily as an- internet machine so I can sit on my couch and surf . It is networked to my G4. The problem is that I came home one day to a black screen. The machine works, I can still see the hard drive my my G4, but I can't get the screen to show. I tried the P-ram. No go. I also tried to put diskwarrior in -the CD, but I can't access the hard drive from my G4. I tried to go to the monitor control panel on the laptop from my G4, but it links to the G4 instead of the laptop. I don't know what else to do. Any suggestions? Or is she finally done?

Message #2 - Posted 2005/02/02 - Cathy Stevenson

Previously, raine1967 wrote:

Hi. I have and old blue iBook, G3. I used it primarily as an- internet machine so I can sit on my couch and surf . It is networked to my G4. The problem is that I came home one day to a black screen. The machine works, I can still see the hard drive my my G4, but I can't get the screen to show. I tried the P-ram. No go. I also tried to put diskwarrior in -the CD, but I can't access the hard drive from my G4. I tried to go to the monitor control panel on the laptop from my G4, but it links to the G4 instead of the laptop. I don't know what else to do. Any suggestions? Or is she finally done?

Try resetting the PMU. This is done differently in different models. Go to Apple support and put "reset PMU" in the search box to find out how to do it in your model.

If it has been plugged in for 48 h (which would recharge the backup battery), and if resetting the PMU doesn't work, then the backup battery may be dead.

The backup battery may cost more than the value of the iBook.

Cathy

"there's a dance or two in the old dame yet." - mehitabel

C.Stevenson, M.D.
cats1921@invalidsonic.net

Message #3 - Posted 2005/02/02 - matt neuburg

Cathy Stevenson wrote:

Previously, raine1967 wrote:

Hi. I have and old blue iBook, G3. I used it primarily as an- internet machine so I can sit on my couch and surf . It is networked to my G4. The problem is that I came home one day to a black screen. The machine works, I can still see the hard drive my my G4, but I can't get the screen to show. I tried the P-ram. No go. I also tried to put diskwarrior in -the CD, but I can't access the hard drive from my G4. I tried to go to the monitor control panel on the laptop from my G4, but it links to the G4 instead of the laptop. I don't know what else to do. Any suggestions? Or is she finally done?

Try resetting the PMU. This is done differently in different models. Go to Apple support and put "reset PMU" in the search box to find out how to do it in your model.

If it has been plugged in for 48 h (which would recharge the backup battery), and if resetting the PMU doesn't work, then the backup battery may be dead.

It might be helpful to test whether the screen is what's having the problem. If this model has a video port, plug in an external monitor. If you can see now, the problem is solved.

The backup battery may cost more than the value of the iBook.

An iBook plus a non-working battery has a value of zero. An iBook plus a $20 backup battery has a value of, say, four more years of use of the iBook, which is worth a lot more than $20 to most people. m.

matt neuburg, phd = matt@tidbits.com, http://www.tidbits.com/matt/ AppleScript: The Definitive Guide
http://www.amazon.com/exec/obidos/ASIN/0596005571/somethingsbymatt Read TidBITS! It's free and smart. http://www.tidbits.com

Message #4 - Posted 2005/02/02 - Raine1967

Thanks. I will try that.

Message #5 - Posted 2005/02/02 - DaveC

If you can see the HD from your G4, it sounds like everything works except the display.

WIth a bright light shining on the display, can you see the desktop icons? If yes, then your CCFL (display backlight lamp) is dead, or the circuit that runs it. If not, then your LCD display is dead.

SImilar to the other possibility suggested by Cathy, might not be cost effective to get it repaired.

Good luck,

Please, no "Go Google this" replies. I wouldn't ask a question here if I hadn't done that already.

DaveC
me@privacy.net
This is an invalid return address
Please reply in the news group

Message #6 - Posted 2005/02/03 - Joe Heimann

Cathy Stevenson wrote:

Previously, raine1967 wrote:

Hi. I have and old blue iBook, G3. I used it primarily as an- internet machine so I can sit on my couch and surf . It is networked to my G4. The problem is that I came home one day to a black screen. The machine works, I can still see the hard drive my my G4, but I can't get the screen to show. I tried the P-ram. No go. I also tried to put diskwarrior in -the CD, but I can't access the hard drive from my G4. I tried to go to the monitor control panel on the laptop from my G4, but it links to the G4 instead of the laptop. I don't know what else to do. Any suggestions? Or is she finally done?

Try resetting the PMU. This is done differently in different models. Go to Apple support and put "reset PMU" in the search box to find out how to do it in your model.

If it has been plugged in for 48 h (which would recharge the backup battery), and if resetting the PMU doesn't work, then the backup battery may be dead.

The backup battery may cost more than the value of the iBook.

Cathy

There is no backup battery in iBooks, so that will not be the problem. PowerBooks, except for the 12" G4, do contain a backup battery.

Joe

Message #7 - Posted 2005/02/03 - nospam

Previously, matt neuburg wrote:

It might be helpful to test whether the screen is what's having the problem. If this model has a video port, plug in an external monitor. If you can see now, the problem is solved.

i wouldn't say it is solved, but the extent of the problem is at least known.

The backup battery may cost more than the value of the iBook.

An iBook plus a non-working battery has a value of zero. An iBook plus a $20 backup battery has a value of, say, four more years of use of the iBook, which is worth a lot more than $20 to most people. m.

ibooks don't have backup batteries. also, you'd be quite surprised what broken ibooks go for on ebay. it is definitely worth substantially more than zero.

ibooks are known for backlight failure. it usually fails for one of two reasons - the hinge cable flexes and breaks or a motherboard issue. if it is the latter, pressure on the left palmrest (usually just below the control key) may cause the backlight to come back on. either way, it needs to be fixed.

it may qualify for apple's repair extension (which expires next month). more info at: <http://www.apple.com/support/ibook/faq/>. if it does, they'll fix it for free.

Message #8 - Posted 2005/02/04 - Cathy Stevenson

Previously, matt neuburg wrote:

Cathy Stevenson wrote:

Previously, raine1967 wrote:

Hi. I have and old blue iBook, G3. I used it primarily as an- internet machine so I can sit on my couch and surf . It is networked to my G4. The problem is that I came home one day to a black screen. The machine works, I can still see the hard drive my my G4, but I can't get the screen to show. I tried the P-ram. No go. I also tried to put diskwarrior in -the CD, but I can't access the hard drive from my G4. I tried to go to the monitor control panel on the laptop from my G4, but it links to the G4 instead of the laptop. I don't know what else to do. Any suggestions? Or is she finally done?

Try resetting the PMU. This is done differently in different models. Go to Apple support and put "reset PMU" in the search box to find out how to do it in your model.

If it has been plugged in for 48 h (which would recharge the backup battery), and if resetting the PMU doesn't work, then the backup battery may be dead.

It might be helpful to test whether the screen is what's having the problem. If this model has a video port, plug in an external monitor. If you can see now, the problem is solved.

The backup battery may cost more than the value of the iBook.

An iBook plus a non-working battery has a value of zero. An iBook plus a $20 backup battery has a value of, say, four more years of use of the iBook, which is worth a lot more than $20 to most people. m.

The iBook doesn't have a backup battery - I had thought that the early "clamshell iBooks did have".

Cathy

"there's a dance or two in the old dame yet." - mehitabel

C.Stevenson, M.D.
cats1921@invalidsonic.net

Message #9 - Posted 2005/02/05 - Joe Heimann

Cathy Stevenson wrote:

Previously, matt neuburg wrote:

Cathy Stevenson wrote:

Previously, raine1967 wrote:

Hi. I have and old blue iBook, G3. I used it primarily as an- internet machine so I can sit on my couch and surf . It is networked to my G4. The problem is that I came home one day to a black screen. The machine works, I can still see the hard drive my my G4, but I can't get the screen to show. I tried the P-ram. No go. I also tried to put diskwarrior in -the CD, but I can't access the hard drive from my G4. I tried to go to the monitor control panel on the laptop from my G4, but it links to the G4 instead of the laptop. I don't know what else to do. Any suggestions? Or is she finally done?

Try resetting the PMU. This is done differently in different models. Go to Apple support and put "reset PMU" in the search box to find out how to do it in your model.

If it has been plugged in for 48 h (which would recharge the backup battery), and if resetting the PMU doesn't work, then the backup battery may be dead.

It might be helpful to test whether the screen is what's having the problem. If this model has a video port, plug in an external monitor. If you can see now, the problem is solved.

The backup battery may cost more than the value of the iBook.

An iBook plus a non-working battery has a value of zero. An iBook plus a $20 backup battery has a value of, say, four more years of use of the iBook, which is worth a lot more than $20 to most people. m.

The iBook doesn't have a backup battery - I had thought that the early "clamshell iBooks did have".

Cathy

Nope, no backup battery in the clamshell iBooks either.

Joe

Message #10 - Posted 2005/02/05 - Xavier Llobet

Previously, DaveC wrote:

If you can see the HD from your G4, it sounds like everything works except the display.

WIth a bright light shining on the display, can you see the desktop icons? If yes, then your CCFL (display backlight lamp) is dead, or the circuit that runs it. If not, then your LCD display is dead.

SImilar to the other possibility suggested by Cathy, might not be cost effective to get it repaired.

Yesterday I had a similar problem: the daughter of a friend found the the screen of her iBook G3 12" (white, dual USB, model A1005) was _almost_ gone. The images (icons, pointer, spinning wheel, etc) can be barely seen, extremely faint.

What are the possibilities?

A friend of mine has told me it must be the inverter, and that it should be possible to change it. The other option is the lamp, but I don't know if it can be replaced, or the whole screen has to be replaced.

Any hints? I suspect the Apple shop will try to charge more that the cost of an used one, so I'd rather do the repair myself, if possible.

_x.

Message #11 - Posted 2005/02/05 - nospam

Previously, Xavier Llobet wrote:

Yesterday I had a similar problem: the daughter of a friend found the the screen of her iBook G3 12" (white, dual USB, model A1005) was _almost_ gone. The images (icons, pointer, spinning wheel, etc) can be barely seen, extremely faint.

What are the possibilities?

as i mentioned elsewhere in this thread, backlight failure is a common problem with ibooks.

A friend of mine has told me it must be the inverter, and that it should be possible to change it. The other option is the lamp, but I don't know if it can be replaced, or the whole screen has to be replaced.

most likely, it is neither. usually the cable breaks within the hinge, or the motherboard itself fails.

Any hints? I suspect the Apple shop will try to charge more that the cost of an used one, so I'd rather do the repair myself, if possible.

actually, the apple shop may fix it for free.

<http://www.apple.com/support/ibook/faq/>

Message #12 - Posted 2005/02/05 - Xavier Llobet

Previously, nospam wrote:

Previously, Xavier Llobet wrote:

Yesterday I had a similar problem: the daughter of a friend found the the screen of her iBook G3 12" (white, dual USB, model A1005) was _almost_ gone. The images (icons, pointer, spinning wheel, etc) can be barely seen, extremely faint.

What are the possibilities?

as i mentioned elsewhere in this thread, backlight failure is a common problem with ibooks.

A friend of mine has told me it must be the inverter, and that it should be possible to change it. The other option is the lamp, but I don't know if it can be replaced, or the whole screen has to be replaced.

most likely, it is neither. usually the cable breaks within the hinge, or the motherboard itself fails.

Would a cable failure allow a faint luminosity? I'd expect a yes/no behaviour... And the fact that the images are barely visible make me suspect some analogic component. That's why my friend hinted at the inverter (if I understood correctly, it's the "power supply" of the screen).

Any hints? I suspect the Apple shop will try to charge more that the cost of an used one, so I'd rather do the repair myself, if possible.

actually, the apple shop may fix it for free.

<http://www.apple.com/support/ibook/faq/>

But the iBook does not present any of these symptoms, listed in that page:

* Scrambled or distorted video
* Appearance of unexpected lines on the screen
* Intermittent video image
* Video freeze
* Computer starts up to blank screen

Although, truly, the serial number is in the "right" range...

_x.

Message #13 - Posted 2005/02/05 - nospam

Previously, Xavier Llobet wrote:

Would a cable failure allow a faint luminosity? I'd expect a yes/no behaviour... And the fact that the images are barely visible make me suspect some analogic component. That's why my friend hinted at the inverter (if I understood correctly, it's the "power supply" of the screen).

cable failure would be on or off and moving the screen *might* make it light up, depending how severe the break is.

motherboard failure might be on, off or dim. what happens is one of the chips delaminates from the motherboard and causes the backlight to not work or other more serious problems. apply pressure to the left palm rest, a little below the control key, but vary the location. if that helps at all, you've identified the problem.

the inverter doesn't usually cause the ibook backlight problem, and although it is a possibility, it isn't likely.

Any hints? I suspect the Apple shop will try to charge more that the cost of an used one, so I'd rather do the repair myself, if possible.

actually, the apple shop may fix it for free.

<http://www.apple.com/support/ibook/faq/>

But the iBook does not present any of these symptoms, listed in that page:

* Scrambled or distorted video
* Appearance of unexpected lines on the screen
* Intermittent video image
* Video freeze
* Computer starts up to blank screen

'blank screen' is apple-speak for 'backlight is broken.'

Although, truly, the serial number is in the "right" range...

take it in. see what they say.

Message #14 - Posted 2005/02/05 - DaveC

On Sat, 5 Feb 2005 10:20:37 -0800, Xavier Llobet wrote (in a previous article):

Would a cable failure allow a faint luminosity? I'd expect a yes/no behaviour... And the fact that the images are barely visible make me suspect some analogic component. That's why my friend hinted at the inverter (if I understood correctly, it's the "power supply" of the screen).

The backlight is just another form of a fluorescent lamp, the kind you have overhead in your office, probably. If you see a little light, it's probably the lamp just glowing a bit.

actually, the apple shop may fix it for free.

<http://www.apple.com/support/ibook/faq/>

But the iBook does not present any of these symptoms, listed in that page:

* Scrambled or distorted video
* Appearance of unexpected lines on the screen
* Intermittent video image
* Video freeze
* Computer starts up to blank screen

These are symptoms of the video *display* cable, not the lamp cable. As far as I know, the lamp's cable doesn't at the hinge like the display cable does. It's not as fragile a cable as the display's cable is.

The lamp can be replaced, but it's not designed to be. It is an integral part of the display, and while some people are replacing them (it requires disassembling the display, not an easy thing to do), it's not for the weak-hearted. Most repair technicians will not replace the lamp; it's not financially advantageous for them. By the time you pay for their time to open up the display and replace the lamp, you could have bought a new display, or paid for a third of a new iBook.

Good luck,

Please, no "Go Google this" replies. I wouldn't ask a question here if I hadn't done that already.

DaveC
me@privacy.net
This is an invalid return address
Please reply in the news group

Message #15 - Posted 2005/02/05 - nospam

Previously, DaveC wrote:

* Scrambled or distorted video
* Appearance of unexpected lines on the screen
* Intermittent video image
* Video freeze
* Computer starts up to blank screen

These are symptoms of the video *display* cable, not the lamp cable.

actually, these are the symptoms of chip delamination from the motherboard. the last one could also be the backlight cable failing.

As far
as I know, the lamp's cable doesn't at the hinge like the display cable does. It's not as fragile a cable as the display's cable is.

i've not heard of the lvds cable breaking anywhere near as often (or at all, really) as the backlight cable.

The lamp can be replaced, but it's not designed to be. It is an integral part of the display, and while some people are replacing them (it requires disassembling the display, not an easy thing to do), it's not for the weak-hearted. Most repair technicians will not replace the lamp; it's not financially advantageous for them. By the time you pay for their time to open up the display and replace the lamp, you could have bought a new display, or paid for a third of a new iBook.

it is not the lamp. his symptoms are consistent with motherboard problems, and given it is within the problematic range, he should have apple fix it (which they probably will).

Message #16 - Posted 2005/02/06 - Xavier Llobet

Previously, nospam wrote:

Previously, DaveC wrote:

* Scrambled or distorted video
* Appearance of unexpected lines on the screen
* Intermittent video image
* Video freeze
* Computer starts up to blank screen

These are symptoms of the video *display* cable, not the lamp cable.

actually, these are the symptoms of chip delamination from the motherboard. the last one could also be the backlight cable failing.

As far
as I know, the lamp's cable doesn't at the hinge like the display cable does.
It's not as fragile a cable as the display's cable is.

i've not heard of the lvds cable breaking anywhere near as often (or at all, really) as the backlight cable.

The lamp can be replaced, but it's not designed to be. It is an integral part
of the display, and while some people are replacing them (it requires disassembling the display, not an easy thing to do), it's not for the weak-hearted. Most repair technicians will not replace the lamp; it's not financially advantageous for them. By the time you pay for their time to open
up the display and replace the lamp, you could have bought a new display, or
paid for a third of a new iBook.

it is not the lamp. his symptoms are consistent with motherboard problems, and given it is within the problematic range, he should have apple fix it (which they probably will).

OK, thanks! I'll tell the girl to take the machine to the Apple dealer, with a printed copy of the page http://www.apple.com/support/ibook/faq/, and see what they say. If finally it is the screen that needs to be replaced, I'll try to do it myself.

Thanks again for your replies!

_x.

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