Beige G3 Video Problems

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gobabushka's picture
Last seen: 4 months 4 weeks ago
Joined: Apr 26 2004 - 16:30
Posts: 495
Beige G3 Video Problems

I just hooked up my beige g3 again, and I can't get any video out of it! It makes the startup bong, it sends some sort of signal to the monitor, but no video is produced. I have tried zapping the pram, a cuda reset, having no ide devices hooked up, everything. Anyone have any suggestons? Did I miss something?

MacTrash_1's picture
Last seen: 17 years 3 months ago
Joined: Dec 20 2003 - 10:38
Posts: 318
Try booting from a CD and see

Try booting from a CD and see if the video comes up.

eeun's picture
Last seen: 1 year 3 months ago
Joined: Dec 19 2003 - 17:34
Posts: 1895
Re: Beige G3 Video Problems

I have tried zapping the pram

Did you check the pram battery? If it's very low, or dead, it may prevent the Mac from starting up past that point.

moros's picture
Last seen: 12 years 6 months ago
Joined: Jan 21 2005 - 08:16
Posts: 65
Beige G3 Video problems

If my beige is anything to go by a flat/low CUDA battery shouldn't keep it from booting Smile

One possibility is that the monitor can't display the signal being sentby the beige. You could try hooking up a different monitor and see if you have any joy with that.

BTW, Have you had it workning in the past or not?


The Czar's picture
Last seen: 13 years 4 months ago
Joined: Dec 20 2003 - 10:38
Posts: 287
Do a warm reboot 3-5 times. L

Do a warm reboot 3-5 times. Let the machine bong, then give it about 20sec then control-command-power. Repeat the process 3-5 times, or until you get video. If after 8 or so tries you don't get video, it's not going to work, and you'll have to investigate other potential causes. It's kinda like the PizzaBoxPowerToggle used on the Pizza-Box LC's to get video on a machine with a flat PRAM battery.


The Czar

Last seen: 15 years 2 months ago
Joined: May 29 2005 - 22:35
Posts: 284
No Video

I have a beige G3 MT, 333Mhz, 192ram and twin turbo video card (8megs vram) I bought this machine with this problem (Cheap,Cheap) and I have come to the conclusion that the rom chip is going bad (ver#.82.1) as the pram battery is new a hard reset (option/command +p&r) will after 4 bongs bring the computer up although at times it will show no hard drive.

I three of these machines and two of them work flawlessly. One using OS 9.2.1, the other OS X 10.2.8 and the problem machine running OS X 10.2. once it starts up it runs ok no problem but shut it down for 8 hours and you are back with the same problem. No Video at boot either from the onboard (ATI 6meg Vram) or the Twin turbo 8meg Vram PCI card.

I did not mean to be so long winded on this subject but I sincerly think the rom chip is going bad and replacing it with a later ver chip could be the cure. I have seen them for sale on E-bay at very reasonable prices.

BTW a dead pram battery will cause the same problem you are experiancing however if its good then go with the rom chip

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