Solve : Motherboard failure??

1.	Solve : Motherboard failure??
Answer» My computer won't boot probably 7 out of 10 times. Not even it will boot into the BIOS screen. In that situation, the reset button is not working and I have to turn off the power and on again. If it manage to boot, it will show "No keyboard present..." or, it will jump into BIOS setup after the memory test, and the keyboard is not working in both situations. Tested with new keyboard but same. Only 1 or 2 times out of 10 that it will boot normally. Could this be a motherboard failure? Nobody has any idea? Quote ... Could this be a motherboard failure? Seems likely. My friend suggested that a power supply failure may also lead to this situation, would it be?No. Power supply either works or it doesn't work.Is there any diagnostic tool can be used to check the functionality of the motherboard? I've TRIED to contact the ASUS's technical support but no reply.You can't check it if it doesn't boot. If it does boot, all will check out normal. Could be a bad component, a cold solder joint or a hairline fracture on the motherboard. Could be broken keyboard connector. I just got one like that myself, sometimes POSTs, sometime doesn't. It's even an Intel motherboard, so you never know.You experience the same before? I strongly believe that it's the problem with the PS/2 port, because sometimes my mouse is not functioning well too. Is there nothing can be done to fix it? How I wish I'm still working with the motherboard manufacturer so that I can replace the connector.Same problem, sitting on the workbench right now, no case just parts laying on the table. Probably why it was thrown in the trash. PS2 connectors are in the corner of the motherboard and not well supported. Probably damaged when inserting or REMOVING keyboard/mouse.I can get a new connector but I'll need a high-temperature (~300 C) soldering sink to melt the solder on the ground point of the connector pins, and I don't have that sink in my house. I don't think any shop will change the connector for you, and it is so unworthy to get a new motherboard just because of a damage cheap PS/2 connector.Probably not the connector, but the point where the connector attaches to the motherboard.You mean the fracture is on the board not the connector? Well, I don't think so, because in my time working in the manufacturing I never met any defect due to the hairline fracture on the board itself.I've seen solder joints break many times. Heat them up and reflow them. I used to design and build circuit cards for computers. I've seen all kinds of failures. You can't see the defects without a microscope. A small fracture can cause a change in CAPACITANCE, without losing complete contact.I see...gotta try that one day...and did that SOLVE your similar ENCOUNTER?Haven't tried it on the one I have now. It's still laying on the bench with no case, boots most every time. Sometimes just removing the motherboard from the case and reinstalling "fixes" it. Overtightening a mounting screw can mess things up.

Answer»

My computer won't boot probably 7 out of 10 times. Not even it will boot into the BIOS screen. In that situation, the reset button is not working and I have to turn off the power and on again. If it manage to boot, it will show "No keyboard present..." or, it will jump into BIOS setup after the memory test, and the keyboard is not working in both situations. Tested with new keyboard but same. Only 1 or 2 times out of 10 that it will boot normally. Could this be a motherboard failure? Nobody has any idea? Quote

... Could this be a motherboard failure?

Seems likely.
My friend suggested that a power supply failure may also lead to this situation, would it be?No. Power supply either works or it doesn't work.Is there any diagnostic tool can be used to check the functionality of the motherboard? I've TRIED to contact the ASUS's technical support but no reply.You can't check it if it doesn't boot. If it does boot, all will check out normal. Could be a bad component, a cold solder joint or a hairline fracture on the motherboard. Could be broken keyboard connector. I just got one like that myself, sometimes POSTs, sometime doesn't. It's even an Intel motherboard, so you never know.You experience the same before? I strongly believe that it's the problem with the PS/2 port, because sometimes my mouse is not functioning well too. Is there nothing can be done to fix it? How I wish I'm still working with the motherboard manufacturer so that I can replace the connector.Same problem, sitting on the workbench right now, no case just parts laying on the table. Probably why it was thrown in the trash. PS2 connectors are in the corner of the motherboard and not well supported. Probably damaged when inserting or REMOVING keyboard/mouse.I can get a new connector but I'll need a high-temperature (~300 C) soldering sink to melt the solder on the ground point of the connector pins, and I don't have that sink in my house. I don't think any shop will change the connector for you, and it is so unworthy to get a new motherboard just because of a damage cheap PS/2 connector.Probably not the connector, but the point where the connector attaches to the motherboard.You mean the fracture is on the board not the connector? Well, I don't think so, because in my time working in the manufacturing I never met any defect due to the hairline fracture on the board itself.I've seen solder joints break many times. Heat them up and reflow them. I used to design and build circuit cards for computers. I've seen all kinds of failures. You can't see the defects without a microscope. A small fracture can cause a change in CAPACITANCE, without losing complete contact.I see...gotta try that one day...and did that SOLVE your similar ENCOUNTER?Haven't tried it on the one I have now. It's still laying on the bench with no case, boots most every time. Sometimes just removing the motherboard from the case and reinstalling "fixes" it. Overtightening a mounting screw can mess things up.

Solve : Motherboard failure??

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