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Reviving a B&W G3


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#1 silvercreekvalley

silvercreekvalley
  • 6502

Posted 13 November 2016 - 03:18 PM

Trying to revive a B&W 350MHz G3 mac I picked up yesterday.

 

So first thing is - it appears to be complete - howevever I have some booting issues. 

 

1) Pressing power on starts the Mac, the disks etc startup. I see a couple of green lights on the PCB so power is OK.

 

2) I get the Mac chime, followed by a short blast of white noise.

 

3) There is then no video output

 

 

I've tried the usual, removed the battery, reset firmware, disconnected the disk drive, reseated the video card and memory and all looks OK.

 

Any ideas - or am I looking at a new motheboard/video card?

 

Thanks



#2 MikeatOSX

MikeatOSX
  • 6502
  • LocationAustria

Posted 13 November 2016 - 09:36 PM

Did you press the cuda button?
http://tim.id.au/lap..._blue.white.pdf
* Mac user since 1992 *

#3 rsolberg

rsolberg
  • 6502
  • LocationVancouver Island, Canada

Posted 13 November 2016 - 11:37 PM

If a CUDA reset doesn't help, I'd try removing and reseating the video card.
68000: Mac SE Superdrive, 68040: Mac Colour Classic "Mystic" w/VGA mod

#4 silvercreekvalley

silvercreekvalley
  • 6502

Posted 14 November 2016 - 09:05 PM

Thanks for the help - yes I tried pressing the CUDA button. Also removed and reseated the video card a few times. 

 

Nothing at all from the video card - tried a few different monitors just in case.

 

Looks like I might need a new motherboard ?



#5 Unknown_K

Unknown_K
  • 68LC040
  • LocationOhio/USA

Posted 15 November 2016 - 04:21 AM

Which video card is installed? Somebody might have just stuck a PC card in and they don't work.  Also try using just 1 stick of PC100 RAM you know is good.


Edited by Unknown_K, 15 November 2016 - 04:22 AM.

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#6 MikeatOSX

MikeatOSX
  • 6502
  • LocationAustria

Posted 15 November 2016 - 08:18 AM

Which video card is installed? Somebody might have just stuck a PC card in and they don't work.

Agree.
I bought two ATI Radeon 7000 PCI 64MB "Mac Edition" from China and one from the USA. Only the second one worked.
Now I have a ATI Radeon 9200 Mac Edition 128MB PCI
https://web.archive....00me/specs.html

Edited by MikeatOSX, 15 November 2016 - 08:27 AM.

* Mac user since 1992 *

#7 Hrududu

Hrududu
  • 6502
  • LocationWichita

Posted 11 December 2016 - 07:16 AM

Sounds like bad RAM or a bad socket.  Try it with a known good (or a couple different sticks one at a time) stick of RAM and try different slots.


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