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Thread: No Screen displayed for IBM P70 - Suggestions to troubleshoot??

  1. #1
    Join Date
    Jun 2012
    Location
    Livermore, CA
    Posts
    229

    Default No Screen displayed for IBM P70 - Suggestions to troubleshoot??

    I was cleaning up the case of an IBM P70 for a friend. It was working. I booted it up and OS/2 loaded up from the hard drive as it should. I used it for a couple hours, and shut it down. I drove it back to my friends house, about 30 miles. It sat there for a few days. When he booted it up again. he had no screen display. I went back over and yes no screen displayed. The Hard drive sounded and felt like it was load OS/2, but obviously can't confirm. There is no external VGA port on this unit. The floppy drive is bad. It was the classic issue of a couple blown caps on it's pcb. I found this out while cleaning it. It was working with this fault.
    This is the first one of these I have working on. Suggestions to trouble shoot the screen?
    Many Thanks
    Atari Falcon030, Atari MSTE, Atari PS3000, STACY 4, 4160STE-CosmosEX, Atari PC1, 400/800/1200XL,800XL,800XE,130XE, XEGS, Apple IIGS, TRS-80 4P, TI 99/4A, Co-Co 3, Amiga 500, C64/128D

  2. #2
    Join Date
    Jun 2012
    Location
    Livermore, CA
    Posts
    229

    Default

    No one has any experience with these?
    Atari Falcon030, Atari MSTE, Atari PS3000, STACY 4, 4160STE-CosmosEX, Atari PC1, 400/800/1200XL,800XL,800XE,130XE, XEGS, Apple IIGS, TRS-80 4P, TI 99/4A, Co-Co 3, Amiga 500, C64/128D

  3. #3
    Join Date
    Oct 2008
    Location
    Kamloops, BC, Canada
    Posts
    5,492
    Blog Entries
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    Default

    You did not mention that you reseated the video subsystem boards when you troubleshooted. All I can think of is something was jostled loose. Do you have any way to confirm the gas plasma panel is even going live?
    = Excellent space heater

  4. #4
    Join Date
    Apr 2012
    Location
    Deventer, the Netherlands
    Posts
    51

    Default

    I once had to replace an electrolitic cap on the video card to get the display on my P70 working again.

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