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Home Forums PM8500 no signs of life — #19 PM8500 no signs of life — #19
Post #19 by haemogoblin
Source ForumPM8500 no signs of life — #19
CategoryHardware
Post DateWed, 27 Feb 2013 - 17:45
Original URLhttps://68kmla.org/bb/threads/pm8500-no-signs-of-life.27418/
Post
Okay guys, spent a good portion of today working on this and i have found out of few things

1. If i remove all the ram and install the cpu card, the PM with give me the broken glass sound. Which stopped after i reinstalled two 32mb sticks in banks A3 & A4

2. The machine boings only when the CPU card is installed, in addition CPU card is getting warm.

3, If i disconnect the scsi hard drive and insert a floppy disk in the floppy drive, the PM with try booting from it and then spit it out, so the logic board is working me thinks

I have no VRAM and i am not getting a display from the onboard video port, however i am using a mac video to VGA adaptor with the dip switches. I'm pretty sure it works as i was last using it on my 6200.

4. I brought down my B/W Powermac from the attic and removed the video card which is a Radeon pci, not sure which. I tried the ATI Rage128 in the B/W and initially it didn't work, gave it a clean and it works fine. I then tried the radeon in the PM8500 and got nothing, the machine does not display a picture. I have tried it in every PCI slot.

Question - does the PM8500 have onboard video memory? As i have no VRAM will the machine even display a picture from it's onboard video port?

Oh in addition i examined the board and not one of the cap is showing sign of leakage.

James

mp.ls