Hello, I’m working on a Turbo XT with a WD1002-WX2 controller / ST-251 drive combination and the card hangs up any machine I put it in. Once by some miracle I was able to boot on a floppy and low-level format the drive using g=c800:5 at the debug prompt, but fdisk locked up on the next boot and now I’m back to hanging up at boot no matter what I try.
I’ve noticed there’s a ton of good info on this card out there in various threads, and I’ve already read the bios chip and it looks clean compared to the other ROMS floating around there. If I can somehow get past the post screen with the card intact I’m sure I can find more out.
Has anyone successfully repaired a board like this, or have any other tips / tricks to get past post? I noticed a few of the chips are extremely hot on the board (see screenshot below.) Guess I’ll work out a way to get it on the bench and start poking around with a logic probe / scope with the schematics handy.
Hot IC’s / Components on the board (in red):
Maybe I should just replace that LS74` on the right but I'd be shooting in the dark.
Motherboard for Reference:
I’ve noticed there’s a ton of good info on this card out there in various threads, and I’ve already read the bios chip and it looks clean compared to the other ROMS floating around there. If I can somehow get past the post screen with the card intact I’m sure I can find more out.
Has anyone successfully repaired a board like this, or have any other tips / tricks to get past post? I noticed a few of the chips are extremely hot on the board (see screenshot below.) Guess I’ll work out a way to get it on the bench and start poking around with a logic probe / scope with the schematics handy.
Hot IC’s / Components on the board (in red):
Maybe I should just replace that LS74` on the right but I'd be shooting in the dark.
Motherboard for Reference: