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Search found 8 matches

by MadcatSE
Tue Nov 09, 2021 1:23 pm
Forum: ThinkPad Legacy Hardware
Topic: 701C battery rebuild: still says "not installed"
Replies: 11
Views: 5209

Re: 701C battery rebuild: still says "not installed"

darn, you're right! Datasheet says that ID is unique for each customer, not the IC itself. darn, that means that I can only reset the counter and not much else. So I guess the BIOS needs to be disassembled and the ID check must be turned off. And that could be really tricky. :(
by MadcatSE
Sun Oct 31, 2021 8:29 am
Forum: ThinkPad Legacy Hardware
Topic: 701C battery rebuild: still says "not installed"
Replies: 11
Views: 5209

Re: 701C battery rebuild: still says "not installed"

Well I didn't find any complete and confirmed solution to reading/writing DS2434 specifically. I do have 866 programmer, but it doesn't support 1-wire. I found some programmers that work with 1-wire, but they use 2 pins (power/data and ground), while DS2434 has three. And there are schematics of how...
by MadcatSE
Sun Oct 31, 2021 8:10 am
Forum: ThinkPad Legacy Hardware
Topic: 701C battery rebuild: still says "not installed"
Replies: 11
Views: 5209

Re: 701C battery rebuild: still says "not installed"

mad props post pics! https://i.ibb.co/7nHvjW8/2021-09-10-00-03-56-min.jpg https://i.ibb.co/qncXt0d/2021-09-10-00-04-03-min.jpg https://i.ibb.co/fFx43xD/2021-09-10-00-04-15-min.jpg https://i.ibb.co/JHs1pwr/2021-09-10-00-25-31-min.jpg https://i.ibb.co/0KbRt4h/2021-09-10-00-36-18-min.jpg https://i.ibb...
by MadcatSE
Sat Oct 30, 2021 4:05 pm
Forum: ThinkPad Legacy Hardware
Topic: I need help with a wierd IBM 701c screen problem
Replies: 4
Views: 1787

Re: I need help with a wierd IBM 701c screen problem

Several months later my machine is *almost* done. All that is left is to rebuild the battery. I already managed to do that in September, by opening up a dead one, changing the elements inside and then gluing it together, and it worked for a whole day! But one of the battery pins on the motherboard h...
by MadcatSE
Sat Oct 30, 2021 4:04 pm
Forum: ThinkPad Legacy Hardware
Topic: 701C battery rebuild: still says "not installed"
Replies: 11
Views: 5209

Re: 701C battery rebuild: still says "not installed"

Hello. I have successfully rebuilt the battery using the same guide. The laptop recognized the battery, it even charged it. Unfortunately the next day one of the pins that connect the battery to the motherboard had broken off due to corrosion and shorted the DS2434, killing it. After that the laptop...
by MadcatSE
Sat Jul 24, 2021 2:53 pm
Forum: ThinkPad Legacy Hardware
Topic: I need help with a wierd IBM 701c screen problem
Replies: 4
Views: 1787

Re: I need help with a wierd IBM 701c screen problem

Well-well-well! I decided to take a shot in the dark and ordered a new screen from aliexpress. The screen is Sharp LQ10D031, and they had one for about 90 USD. It took 10 days to arrive and - amazingly! - it worked! https://imgur.com/IyJtW7E It hurts that I have to wait till other parts arrive befor...
by MadcatSE
Wed Jul 14, 2021 7:29 am
Forum: ThinkPad Legacy Hardware
Topic: I need help with a wierd IBM 701c screen problem
Replies: 4
Views: 1787

Re: I need help with a wierd IBM 701c screen problem

Already done that, the battery fell apart during disassembly (it even leaked, but still holds 2.2v). The laptop now is completely disassembled for ease of inspection. Also removed flex cable from both sides and reinstalled - nothing, still the same problem. Or did you mean CMOS battery? I didn't de-...
by MadcatSE
Wed Jul 14, 2021 7:00 am
Forum: ThinkPad Legacy Hardware
Topic: I need help with a wierd IBM 701c screen problem
Replies: 4
Views: 1787

I need help with a wierd IBM 701c screen problem

Hello, 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"...

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