That mother board want reboot

The fan is a brushless fan and very reliable but they do go wrong check to see if you have the supply to the fan assembly there are usually three wires two are the supply the other is the speed control wire tacho run the fan on a separate supply and see if the fan runs before you start checking the voltage on the mother board first.The most common fan for failure is the exhaust fan or heat output fan because it is always mounted near the lamp assembly and bearings do not like heat

That problem is usually have 2 causes..Its either power supply board or main board..

Please take this steps on how to determine the problem:
1. Open the back cover.
2. Check the power supply output...It should have 5vdc for the main board..12vdc or 16vdc for the audio and 24vdc for the back-light inverter..
3. If those 3 voltage supplies have encountered voltage drop...The problem could be on power supply board..
4. If the power supply output is normal..The problem could be on the main board...
5. If the problem is power supply you should check if the capacitors are bulged on the top and try to replaced it..If you can't do that you can purchased new power supply board..
6. If the problem is on main board there is no D.I.Y repair on that so you need to buy a new main board that fits to your TV..
Hope this solution will be helpful..

Thanks for using fixya...

did you check the power supply if it is working?.look for the exhaust fan if it is rotating. then look at the mother board if the fan at the processor is also rotating if not check the supply first at the PSU if ok.

the answer is Yes and yes start withthe capisitor . But it could well be the motoer at shich case you will want to replace the capisitor . Hope thsi helps Jon

usually power supplies comes in different voltage n wattage . check ur mother board manual that which type of powre supply it support than replace it with the good one.it may solve ur problem.thanks

Dear,

ELECTRIC SHOK OR IMPROPER EARTHING IS DAMAGE POWER SUPPLY,MOTHERBOARD,PROCESSOR,RAM
HOW TO CHECK IT.

(WHEN CHECKING KEEP CAUTION :- REMOVE HARD DISK DRIVE POWER SUPPLY SOCKET)

1. check power supply watt 400/450 and same another power supply install and check it. if power supply change and system is working ok so problem in your power supply.

2. check CMOS cell on motherboard,(3 volt)

3. Bfore power supply changing check on mother board any capasitor is like as damaged or not.
OR check main chipset ic is marked as intel.whenpower on it is very hitting or
normal)if very hitting require to repair your motherboard.(intel chipset ic near cmos cell or pci slot,)
4. checking of ram on other pc (working or not)(one beeps coming or not,if one beep coming ram is working ok)

Sounds like the MotherBoard is dead?

My be something wrong with your ATX. It can depend on transistors too. If you have tester you can check all ATX pins.

Your mohterboard seems to be bad! If you have replaced the power supply and placed all connections in the rightful place, with no result! Your Motherboard is definetly bad!

you dint mention the mother board u are using in some motherboards jumber setting can power up the system check the jumber setting in the mother board near ur front pannel pins in ur motherboard