Hello,
My desktop motherboard (MSI 785GM-E51, AMD Phenom II Processor) has failed.
FYI - MSI states in their user manual for the motherboard that it is designed for providing power to CPU by phases. As I understand it, as the CPU requires more power, additional phases are switched on/off depending on the load.
Well, this time, when the machine boot started, the power indicators flashed in usual pattern, and then suddenly all 4 leds lit up and stayed on.
The Power supply switches on if I try to start the machine; also, the ventilation fans start and stay on. So it indicates basic circuitry required to switch on power supply is working fine. After this, the machine does not boot up, no beeps, no video signal - nothing. The 4 leds stay lit.
My options now are to look for are any blown micro-fuses (board mount), power monitor chip etc. When I checked board visually and touched parts in the power section of the MOBO, nothing seemed to be out of place (burnt, hot parts). But, I do not have the service manual an/or board component layout diagram to get in to it. Tracing power connections in a multi-layer board is a pain because of distributed power planes.
Trying to find the information on motherboard fault finding guidelines and also service manual for the board. Will appreciate any help in fixing this issue.
With Warm Regards,
Ravi
My desktop motherboard (MSI 785GM-E51, AMD Phenom II Processor) has failed.
FYI - MSI states in their user manual for the motherboard that it is designed for providing power to CPU by phases. As I understand it, as the CPU requires more power, additional phases are switched on/off depending on the load.
Well, this time, when the machine boot started, the power indicators flashed in usual pattern, and then suddenly all 4 leds lit up and stayed on.
The Power supply switches on if I try to start the machine; also, the ventilation fans start and stay on. So it indicates basic circuitry required to switch on power supply is working fine. After this, the machine does not boot up, no beeps, no video signal - nothing. The 4 leds stay lit.
My options now are to look for are any blown micro-fuses (board mount), power monitor chip etc. When I checked board visually and touched parts in the power section of the MOBO, nothing seemed to be out of place (burnt, hot parts). But, I do not have the service manual an/or board component layout diagram to get in to it. Tracing power connections in a multi-layer board is a pain because of distributed power planes.
Trying to find the information on motherboard fault finding guidelines and also service manual for the board. Will appreciate any help in fixing this issue.
With Warm Regards,
Ravi