First post, by Raph33BDX
Hi everyone,
I'm humbly requesting help with a system that won't boot.
Initially I got the endlessly repeating beeps telling me there was a memory issue.
I cleaned everything with isopropyl alcohol, now the beeps are gone.
But now I get no beep at all ... and just a blank screen, the monitor isn't detecting any signal.
The only good part is that the PSU seems fine, Pwr led is on, reset button seems to work, CPU fan works fine, HDD makes the usual firing up noise.
The MB is a Soyo SY-5BT 2.0
https://theretroweb.com/motherboards/s/soyo-sy-5bt5-2.x
with
P166MMX
64Mo Sdram
CL GD5440 1Mo Pci
SB Vibra16S CT2800
I tried booting up with different ram sticks installed, EDO and Sdram. No change.
Tried booting up only with the video card (the Cirrus Logic and a 512Ko Oak Oti087). No change.
I know the Oak works for sure because I used it a few months ago in another system. Not sure about the Cl though.
I am quite sure I got the jumper settings right for Vcore voltage and Cpu type.
The only thing is, initially I got the cpu voltage wrong without realising and booted up in 3.3v instead of 2.8v, for a few seconds, maybe 3 or 4 times.
Is there any chance this could have fried the cpu?
In any case I got a couple of Pentiums from Ebay to do more tests.
Thanks in advance
Raph