I've gotten around to testing my ASUS CUSL-2 Motherboard with a Pentium III 933MHz. Sadly I can't get it to boot. The CPU and case fans spins up for a second, then nothing.
After trying most tips and tricks I'm left wondering if my brand spanking new 400W PSU is the problem. Could it be a 5V problem?
Simmerhead - Old is gold!
Do not think it is the PSU. What BIOS version does the board have ? the 933 is supported with v1007 and up: https://www.asus.com/supportonly/CUSL2/HelpDesk_CPU/
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
Horun wrote on 2022-10-11, 00:50:Do not think it is the PSU. What BIOS version does the board have ? the 933 is supported with v1007 and up: https://www.asus.com/supportonly/CUSL2/HelpDesk_CPU/
I haven't gotten into the BIOS, so no way of knowing, but the board came with the CPU installed and had been functioning for many years, so it is compatible.
Simmerhead - Old is gold!
Check V on VRM module.
PC#1 Pentium 233 MMX - 98SE
PC#2 PIII-1Ghz - 98SE/W2K
Pic of the board? These boards are known to have a pattern of 3 bad caps near the socket.
Please let me know if you can spot anything obvious. Thanks!
Simmerhead - Old is gold!
The two electrolytics in the top right corner might be defective. They look a bit bulged in the 1st picture, in the second they look o.k.
The others are *looking good* - this doesn´t mean they are still ok.
Neverthetess I would recommend testing with a known good PSU first, before thinking about replacing the electrolytics.
I visually checked all CUSL2 models and they all have the same board with different options,
- VGA no AUDIO, CUSL2; https://theretroweb.com/motherboards/s/asus-cusl2
- AUDIO no VGA, CUSL2-C; https://theretroweb.com/motherboards/s/asus-cusl2-c
- AUDIO and VGA, CUSL2-M; https://theretroweb.com/motherboards/s/asus-cusl2-m
If it helps.
PC#1 Pentium 233 MMX - 98SE
PC#2 PIII-1Ghz - 98SE/W2K
majestyk wrote on 2022-10-11, 17:43:The two electrolytics in the top right corner might be defective. They look a bit bulged in the 1st picture, in the second they look o.k.
The others are *looking good* - this doesn´t mean they are still ok.
Neverthetess I would recommend testing with a known good PSU first, before thinking about replacing the electrolytics.
Absolutely.
Also check if there is any V out of the VRMs with the correct voltage.
Describe in detail what happens when you power it on, beeps, fan?
Troubleshoot needs details 😀
PC#1 Pentium 233 MMX - 98SE
PC#2 PIII-1Ghz - 98SE/W2K
