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monitor dying or PRAM battery?

Message #1 - Posted 2004/09/29 - nosredna

Can someone help me diagnose a problem? Yesterday my monitor (ViewSonic GA655, connected to a Performa 6116 with a VGA adapter with dip switches) wouldn't "wake up" when I hit the space bar. (I didn't hear the Mac's normal "bip bip bip waking up sounds and the monitor stayed black.) I couldn't shut down the normal way, so I used the power button, and connected a spare monitor for testing. It worked, but only after I switched one of the dip switches off then back on, and restarted again (with the Mac's power button). So, I thought that maybe the ViewSonic would work if did the dip switch clicking and restarting trip, and yes, after reconnecting and doing that, the ViewSonic did work. This morning when I turned on the Mac, the ViewSonic was again black, so I restarted with the power button, and the monitor worked. A message did come up saying "the time is incorrect." I know the PRAM battery keeps date and time current, and I haven't replaced it in two or three years. My question is, could a dying PRAM battery cause the monitor to not wake up, since I think the wake-up is controlled by the Monitor control panel?

Message #2 - Posted 2004/09/30 - Martin Crisp

On Thu, 30 Sep 2004 04:29:50 +1000, nosredna wrote (in a previous article):

Can someone help me diagnose a problem? Yesterday my monitor (ViewSonic GA655, connected to a Performa 6116 with a VGA adapter with dip switches) wouldn't "wake up" when I hit the space bar. (I didn't hear the Mac's normal "bip bip bip waking up sounds and the monitor stayed black.) I couldn't shut down the normal way, so I used the power button, and connected a spare monitor for testing. It worked, but only after I switched one of the dip switches off then back on, and restarted again (with the Mac's power button). So, I thought that maybe the ViewSonic would work if did the dip switch clicking and restarting trip, and yes, after reconnecting and doing that, the ViewSonic did work. This morning when I turned on the Mac, the ViewSonic was again black, so I restarted with the power button, and the monitor worked. A message did come up saying "the time is incorrect." I know the PRAM battery keeps date and time current, and I haven't replaced it in two or three years. My question is, could a dying PRAM battery cause the monitor to not wake up, since I think the wake-up is controlled by the Monitor control panel?

Not sure about the wake-up, but the other issues are certainly indicators that your battery is dead.

Have Fun
Martin

aa #1792

Almost always SMASHed

Message #3 - Posted 2004/09/30 - Zeph

Previously, Martin Crisp wrote:

On Thu, 30 Sep 2004 04:29:50 +1000, nosredna wrote (in a previous article):

Can someone help me diagnose a problem? Yesterday my monitor (ViewSonic GA655, connected to a Performa 6116 with a VGA adapter with dip switches) wouldn't "wake up" when I hit the space bar. (I didn't hear the Mac's normal "bip bip bip waking up sounds and the monitor stayed black.) I couldn't shut down the normal way, so I used the power button, and connected a spare monitor for testing. It worked, but only after I switched one of the dip switches off then back on, and restarted again (with the Mac's power button). So, I thought that maybe the ViewSonic would work if did the dip switch clicking and restarting trip, and yes, after reconnecting and doing that, the ViewSonic did work. This morning when I turned on the Mac, the ViewSonic was again black, so I restarted with the power button, and the monitor worked. A message did come up saying "the time is incorrect." I know the PRAM battery keeps date and time current, and I haven't replaced it in two or three years. My question is, could a dying PRAM battery cause the monitor to not wake up, since I think the wake-up is controlled by the Monitor control panel?

Not sure about the wake-up, but the other issues are certainly indicators that your battery is dead.

As is, strangely, the wakeup. Used to have this problem regularly with Quadra 605s -- once the PRAM battery died we'd have to toggle the power switch several times in quick succession to get the screen up -- replacing the battery solved the problem.

z

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