First post, by Nexxen
- Rank
- Oldbie
Hello everyone!
I have said board but I have strange readings on voltage and general issues:
-- board stopped working -- some component died and can't figure out which
EDIT 11/08/2021: it was the LM80 IC, fan controls and voltages check...
- only 512MB of ram detected albeit 768 being the maximum for this board
- fan headers tachometer +9V, Vcc 0V, Gnd no connection to gnd... now 12V on vcc and tachometer is fine with its voltage
- of the integrated usb, one didn't work and if anything was plugged in it wouldn't boot
- many smd caps close to USB are shorted in fact they are filters
- 3.3V and gnd in short circuit not anymore as something has died in between
- an IC (9cdy8nk 7407) with an smd cap soldered to gnd and adjacent leg which is not connected to Voltage. actually correct
- one smd resistor was misplaced (340?) and one is missing (solder points are there) not affecting anything, just missing
- some tantalum caps (yellow blobs) do short
Board boots and I flashed the last BIOS. not anymore, not even displaying values on post card
Many caps are in short but when desoldered they are not, thus my guess is that something has gone very bad 😀 there is a dead component shorting to ground
Thanks in advance to any contributor.
Update: after removing one cap it now beeps for a short while and stops; I have 12V continuity on fan headers 😀 still no ground though
Update 2: a few ICs seem to have failed and need to be replaced. I still miss the value for a couple of resistors (see pic)
Edit 10/05/21: quite some time has passed since and I recon some IC was dying thus all the strange readings + a lack of knowledge on my side led to wrong deductions and hasty assumptions
This thread is basically useless so far.
PC#1 Pentium 233 MMX - 98SE
PC#2 PIII-1Ghz - 98SE/W2K