front header not working s7 board \ VOGONS

front header not working s7 board

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First post, by waterbeesje

Posted on 2024-06-28, 23:03

waterbeesje Offline

Rank Oldbie

Rank: Oldbie
Posts: 816
Joined: 2020-01-06, 20:53
Location: The Netherlands

I have this socket 7 board, San Li SL-586V. Is working just fine with a Pentium 166 but the front panel headers don't work at all.
No HDD led
No power led
No reset button
No speaker
Double checked out it could be polarity (turning the connector around doesn't work).

I've tested the LEDs and stuff on other motherboards and they work just fine ( it's a loose bundle of cables for testing purposes).
The board is properly connected to the backplate of my test bench, no grounding issues.

Could this be a quick fix?
I'm gonna sell the board, so I'm not going to put lots of time into it...

Stuck at 10MHz...

Reply 1 of 1, by Horun

Posted on 2024-06-29, 03:40

Horun Offline

Rank l33t++

Rank: l33t++
Posts: 6909
Joined: 2019-09-19, 02:19
Location: USA

Could be a polarity issue on LEDs but reset has no polarity. From the board picture is does appear that the silkscreen tries to identify pinout.
My guess is pins at edge of board are 9-18. In other words: the pins are not numbered as standard (one side odd, other even)
here is a quick picture of what I think (probably wrong but try it). Just a quick 5 minute look....

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

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