Background
I have my first custom build of computer running fine for almost 3 years before it finally unable to boot up properly recently. I have my computer installed with Intel Celeron 430 (1.80GHZ), 75W processor with fan; 1GB Kingston Module DDR2 667MHZ ram; ATI RADEON graphic card and 450W/500W Power Logic PSU. All the fans are working (graphic card, cooler and PSU) when I turn the computer casing power button ON. The power LED won't turn ON and seems to have been shorted. I have plugged in the motherboard buzzer or speaker, graphic card, LCD monitor and VGA cable into place but whenever I turn it on I have no signal from my motherboard and no POST beeps as well....only DARK SCREEN!
Motherboard
This is an ECS G31T-M7 REV:7.0 motherboard made by Elitegroup. It will not POST. Specifications link:
http://www.ecsusa.com/ECSWebsite/Pro...uID=16&LanID=9
Service Manual at:
Symptoms
- HSF fan never ending spinning
- No LED light on case F/PANEL
- No beeps
- No displays
- No POST
Tests Done So Far
Here is what I have tested so far and found. All resulted in no beeps and no POST:
- all tests done below with the motherboard "breadboard" (that is out of the case sitting on a cardboard box)
- reseated the existing 3V battery (measures 3.16V DC on multimeter)
- cleared CMOS battery by removing it for a day and tried moving the clear CMOS jumper
- all voltages on PSU are within tolerances
- check the standard voltages on the motherboard with a multimeter
- check the capacitors voltages are within tolerances with a multimeter
- desoldered the NICHICON HM(M) 1000uF 6.3V capacitor suspected to become shorted and overfilled because the voltage converted from 5V > 1.5V
- keyboard (num, caps, and scroll lock) all light up initially and then go out (after that, it seems that the keyboard does not work)
- tried one DIMM in slot 1 and then slot 2 and get no beep
- tried removing all DDR memory and still get no beeps
- turn the board on and off by shorting the power SW-PINS (southbridge is partially working)
Questions
What can I do or anything to try to make this board work again ? And what should be the best repalcement capacitors for NICHICON HM(M) 1000uF 6.3V ?
Any suggestions for this motherboard recap as I have 10 NICHICON HM(M) 1000uF 6.3V ? sitting in this motherboard while the rests are Teapo capacitors ?
PLEASE HELP!!!
I have my first custom build of computer running fine for almost 3 years before it finally unable to boot up properly recently. I have my computer installed with Intel Celeron 430 (1.80GHZ), 75W processor with fan; 1GB Kingston Module DDR2 667MHZ ram; ATI RADEON graphic card and 450W/500W Power Logic PSU. All the fans are working (graphic card, cooler and PSU) when I turn the computer casing power button ON. The power LED won't turn ON and seems to have been shorted. I have plugged in the motherboard buzzer or speaker, graphic card, LCD monitor and VGA cable into place but whenever I turn it on I have no signal from my motherboard and no POST beeps as well....only DARK SCREEN!
Motherboard
This is an ECS G31T-M7 REV:7.0 motherboard made by Elitegroup. It will not POST. Specifications link:
http://www.ecsusa.com/ECSWebsite/Pro...uID=16&LanID=9
Service Manual at:
Symptoms
- HSF fan never ending spinning
- No LED light on case F/PANEL
- No beeps
- No displays
- No POST
Tests Done So Far
Here is what I have tested so far and found. All resulted in no beeps and no POST:
- all tests done below with the motherboard "breadboard" (that is out of the case sitting on a cardboard box)
- reseated the existing 3V battery (measures 3.16V DC on multimeter)
- cleared CMOS battery by removing it for a day and tried moving the clear CMOS jumper
- all voltages on PSU are within tolerances
- check the standard voltages on the motherboard with a multimeter
- check the capacitors voltages are within tolerances with a multimeter
- desoldered the NICHICON HM(M) 1000uF 6.3V capacitor suspected to become shorted and overfilled because the voltage converted from 5V > 1.5V
- keyboard (num, caps, and scroll lock) all light up initially and then go out (after that, it seems that the keyboard does not work)
- tried one DIMM in slot 1 and then slot 2 and get no beep
- tried removing all DDR memory and still get no beeps
- turn the board on and off by shorting the power SW-PINS (southbridge is partially working)
Questions
What can I do or anything to try to make this board work again ? And what should be the best repalcement capacitors for NICHICON HM(M) 1000uF 6.3V ?
Any suggestions for this motherboard recap as I have 10 NICHICON HM(M) 1000uF 6.3V ? sitting in this motherboard while the rests are Teapo capacitors ?
PLEASE HELP!!!
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