Laptop HP Classmate Notebook PC turns on and off repeatedly, restart loop.

The laptop HP Classmate Notebook PC turns on without showing any image on the screen. After a few seconds it turns off by itself. Then it turns on and off again, restart loop.
Possible problem:

·         RAM failure; your laptop HP Classmate Notebook PC turn on without showing any image on the screen. After a few seconds it turns off by itself. Then it turns on and off again, restart loop. It’s possible one of the memory modules failed. In this case you can try cleaning and reseating memory modules to make sure they are making good contact with the slot. You can try removing memory modules one by one and test the laptop with only one module installed. You can try replacing memory modules.

·         Hard Drive or DVD Drive failure; your laptop HP Classmate Notebook PC turn on without showing any image on the screen. After a few seconds it turns off by itself. Then it turns on and off again, restart loop. Maybe you have a Hard drive or DVD drive failure, Take out the hard drive, DVD drive and power on the laptop.

·         Motherboard failure; your laptop HP Classmate Notebook PC turn on without showing any image on the screen. After a few seconds it turns off by itself. Then it turns on and off again, restart loop. In this there is chance you have failed Motherboard, check motherboard electronics components temperature with your finger and test the voltage and continuity with a voltmeter. The failed electronic component has to be replaced.

·         BIOS failed, motherboard electronics components look good, System power (3V/5V) work fine, you can measure the 3.3V and 5V on the motherboard, No electronics components have short or overheating and 3.3V on the power button, BIOS has to be reprogrammed (flash bios).

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