Hello all,
I have had this motherboard for a long time and started trying to use it again.
As alot of you know its a Socket A(462) motherboard from the bad caps era.
Mine contains Rubycon MBZ 3300uf as VRM in and output. The caps look fine from the outside but the board itself has this problem;
If i turn the power off (completely unplugged for >30min) and then turn it on, the board will post just fine and i'm able to go into BIOS, modify it, save it and actually boot from it. Earlier I was able to install Windows on it, but now, just before it goes into the Windows desktop the monitor goes into standby.
When i turn off the machine and turn it on again (with power still connected), no matter how many times, the monitor will stay in standby. It won't give me a POST beep and the motherboard voice is quiet. It only works again by completely unplugging it for >30 minutes and then turning it on again. This happends over and over again, even with the default bios values. I have tried everything related to GPU (tried multiple also PCI, also AGP with 12V), the PSU is a brand new corsair with 25A on 5v line (tried different ones, also old one with 30A), multiple CPU's (1800+, 2600+,3200+) and different DDR memory. I also tried multiple BIOS versions and all have exactly the same issue.
My theory is that the VRM caps are bad and/or out of spec even though they are not bulged. At the first "charge" they somehow work partially, but when finally charged they fail after turning off the system. I'm not an electronic expert but i'm wondering if its worth recapping to fix this. The first time ALWAYS boots the system (after unplugged 30min), and all boots after ALWAYS fail while keeping the PSU power plugged in. Restarting the system (reset button) at first boot is never a problem.
I know these boards have a big history but i could not find similar issues to mine using google. Have you ever seen this sort off issue? Please help.
Thanks for reading.
I have had this motherboard for a long time and started trying to use it again.
As alot of you know its a Socket A(462) motherboard from the bad caps era.
Mine contains Rubycon MBZ 3300uf as VRM in and output. The caps look fine from the outside but the board itself has this problem;
If i turn the power off (completely unplugged for >30min) and then turn it on, the board will post just fine and i'm able to go into BIOS, modify it, save it and actually boot from it. Earlier I was able to install Windows on it, but now, just before it goes into the Windows desktop the monitor goes into standby.
When i turn off the machine and turn it on again (with power still connected), no matter how many times, the monitor will stay in standby. It won't give me a POST beep and the motherboard voice is quiet. It only works again by completely unplugging it for >30 minutes and then turning it on again. This happends over and over again, even with the default bios values. I have tried everything related to GPU (tried multiple also PCI, also AGP with 12V), the PSU is a brand new corsair with 25A on 5v line (tried different ones, also old one with 30A), multiple CPU's (1800+, 2600+,3200+) and different DDR memory. I also tried multiple BIOS versions and all have exactly the same issue.
My theory is that the VRM caps are bad and/or out of spec even though they are not bulged. At the first "charge" they somehow work partially, but when finally charged they fail after turning off the system. I'm not an electronic expert but i'm wondering if its worth recapping to fix this. The first time ALWAYS boots the system (after unplugged 30min), and all boots after ALWAYS fail while keeping the PSU power plugged in. Restarting the system (reset button) at first boot is never a problem.
I know these boards have a big history but i could not find similar issues to mine using google. Have you ever seen this sort off issue? Please help.
Thanks for reading.
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