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overheating

By rssagoo2002 ·
Hi,

I have a PC with Intel Motherboard D845PESV. with good intel fan, thermostat.

of recently it is overheating the moment it is switched on. because of the temperature sensor /thermostat it switches off itself on overheating.

have checked fan, heat sink contact etc - all well. tested with all devices disconnected.

pls advise.

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by 3xp3rt In reply to overheating

If the temperature grove so fast it?s mean that you have some big problem.
For the first time check the Power supply. If its Ok probably you have some bad component on motherboard. Of sure if work fine the temperature sensor /thermostat.

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by 3xp3rt In reply to overheating

If the temperature grove so fast it?s mean that you have some big problem.
For the first time check the Power supply. If its Ok probably you have some bad component on motherboard. Of sure if work fine the temperature sensor /thermostat.

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by wcp In reply to overheating

The cause may be due to failing CPU or Motherboard (MB).

If possible, set the shutdown temperature to 65 degrees in Celsius in BIOS. Save the setting and reboot. Go to BIOS and observe the CPU temperature. If it indeed overheats, do BIOS flash.
If this does not resolve the problem, you need either a known good CPU or MB to find the culprit.

1. Known good CPU ? Install it on your MB. If it overheats, the MB is bad. If it does not, the first CPU is bad.

2. Known good MB ? Install your CPU on the MB. If it overheats, the CPU is bad. If it does not, the first MB is bad.

If you do not have any of these, you need to take your system to a reputable service place.

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by TheChas In reply to overheating

Are you sure it is shutting down from over temp and not over voltage?

For such a quick shut down, I would suspect either a broken temperature sensor, or a problem with the voltage regulators on the motherboard.

Take a look at the components near the CPU. You are looking for burnt, cracked, bulges and signs of leaking liquid.

If you find any of these, the voltage regulators on the motherboard are the problem.

I not sure about Intel based systems, but for AMD systems there is a thermistor in the middle of the CPU socket. If the leads break or are twisted, it will send a false reading.

Either way, I suspect that you need a new motherboard, or to have yours repaired.

Chas

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by ozi Eagle In reply to overheating

Hi,

Because the problem occurs immediately you turn on, I don't think its temp related - too quick.

Check your mobo electrolytics, around the cpu.
If they are bulging at the top, leaking or have partialy blown the can off, then that is your problem.
The fix is generally a new mobo, or if you are super confident in your soldering skill you can try to replace them. I would suggest that you replace all caps of the same type as the faulty one.
See recent TR discussions on this.

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