Re: IBM 5150 motherboard continuous beeps after 20 seconds
Posted on 2024-04-01, 07:48
Okay, I have discovered this is actually my fault that I didn't noticed that I have bridged two connectors on an IC (pins 7 and 8 on 74LS322 at U24) near the switch block. Bits of solder fell from the soldering iron and bridged two connectors, I have de-soldered the two contacts, but there was still …