VOGONS


First post, by H.W.Necromancer

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Solved! Running!
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Hallo,

I have got this board few years ago with a missing bios chip. I have burned a new one (bios found on the Internet) and tried to revive the board. But I was only partly successful.
I got beeps (do not remember now how many) but it was something related to VGA memory.
But why I am here - during the process I accidentally flipped the eeprom chip and killed it. Unfortunately, it looks the board died as well.
I have prepared another bios chip but now the board is not even beeping as before.
I socketed the DALLAS chip and hook up a battery on it - but this I tried later after the incident. Probably nothing to do with my problem.
So...do you think is there any chance to save it? Yes, I know I am an idiot - but you know, we are just humans, and it was some years ago when I was a "rookie" at all.
I am suspecting on of the 74LS245 TTL chip as it is in the circuit with the bios chip and those die quite easily...
However how big is the chance I fried the chipset itself?
Any help will be appreciated! Thank you.
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Reply 1 of 1, by H.W.Necromancer

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Hallo, after all the struggle it is alive!! And I am happy as no ZIDA board deserves to die.
I have socketed the KB controller, one 74Ls245 IC in the data path of the bios chip and DALLAS (for future easier maintenance) and put spare parts in to those sockets with no avail.
Than I just took out the bios chip and burn the bios again. The same way as 2 years ago! But now it worked like a charm and not only the board started beeping again, it just booted and is working.
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1) I am happy I had not killed it
2) Don ´t be stupid like me and start from the simple stuff 😂
3) But I have learned a lot - I am now much better with my desolder and soldering iron and having the DALLAS and KB controller socketed make perfectly sense for the future.
4) If any of you are struggling with this board I am happy to help