I want to apologize for my English beforehand, and want to ask for help.
I have recently acquired an IBM 701c in a rather average condition. The person who sold it told me that some time ago he started to get the CMOS battery and RAM errors, and he gave the laptop to repair to a "recommended" repairman. Unfortunately the repairman turned out to be an alcoholic (such is life in wonderful Russia ). He disassembled the laptop, changed the small 1.2nicd battery for a 3v lithium one ( ), didn't even find a CMOS battery on the bottom board, assembled it again and returned it not only with the same CMOS and RAM problems, but with a new one: now the screen image is constantly scrolling down. Here is the video of the problem:
The laptop still manages to boot into Windows 95, so I guess the motherboard SHOULD be ok, right?
At first I thought that it may be the problem with the flex cable of with careless assemble. But when I disassembled it I found that the flex cable seems OK. No matter how much I push, pull or squeeze it the picture problem doesn't go away. The connectors for it also seem ok. And the connector to the display itself looks fine and sits tight. So now I am kinda lost. I don't have port replicator for it, so I can't test the external VGA connector. Nor do I have a separate machine for testing the parts. Do anyone have an idea what could cause this problem: the screen, flex cable, bottom motherboard or maybe even the top motherboard (I still don't like that he used 3v non-rechargeable battery for a replacement of 1.2v rechargeable one)?
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Remove that 3V Lithium battery and try to run without it.
Also reseat the LCD cable at both ends (requires a fair bit of taking the 701c apart).
Covid-19: Stay safe, so still Mask it or Casket!
Or did you mean CMOS battery? I didn't de-solder it yet, could it help? I don't see how could it help...
Update: took the CMOS battery out, didn't help (as I expected).
It hurts that I have to wait till other parts arrive before assembling it, but it's nice to know that it's no longer an "IF" situation for me. ^_^
Anyway, here is a little video of my machine in action
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