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Fixing a Keyboard controller error on a socket 7 motherboard

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First post, by Linoleum

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I am planning on repairing a Shuttle 557 v1.32 Socket 7 motherboard that I killed when assuming a PS/2 mouse header with 5 pins had the same wiring as a header with 6 pins. So I probably injected 5V somewhere I should not have...

The motherboard posts, displays image and does ram count. BUT it beeps like crazy within seconds of turning on, like when pressing all the keys at the same time; not like an error beep. Of course I get a keyboard error message...

I tested everything around the keyboard and PS/2 header for continuity (including the F1 fuse), and no problems there! So right now, I am planning on replacing the keyboard/mouse controller HT6542B chip... Is there anything else I should be looking out for? Is there even a chance I can fix it by just replacing the keyboard controller?

#1: Sempron 3000+, 1Gb, HD3650 AGP, SB Audigy 2 ZS
#2: P4 1.8Ghz, 512Mb, Voodoo3 3000, SB Live!
#3: P3 866Mhz, 384Mb, Riva TNT2 AGP, SB Live!
#4: P233 MMX, 64Mb, ATI Rage II+, SB 32
#5: P100, 32Mb , S3 Virge, Sb16 & PicoGus v2.0

Reply 2 of 2, by Linoleum

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kingcake wrote on 2024-04-14, 21:25:

If the fuse tests good I would say there is probably a good chance the keyboard controller would fix it.

Thanks! Ordered a knockoff from Aliexpress... We'll see if they are any good.

#1: Sempron 3000+, 1Gb, HD3650 AGP, SB Audigy 2 ZS
#2: P4 1.8Ghz, 512Mb, Voodoo3 3000, SB Live!
#3: P3 866Mhz, 384Mb, Riva TNT2 AGP, SB Live!
#4: P233 MMX, 64Mb, ATI Rage II+, SB 32
#5: P100, 32Mb , S3 Virge, Sb16 & PicoGus v2.0

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