ProBook

Hello
My laptop is a HP ProBook 4520, his running a 64-bit version of windows 7, and recently, he has stopped booting the system successfully. Suddenly I turn it on and the screen remained black and he is a fan of high avtivity that the computer turns on, the screen would remain dead and caps lock lights flashing regularly 3 times each time.

I tried to remove the battery and press the botton to power for one minute and turn it on with the AC adapter only, but not even the chance to spin again problem.

Any suggestions? I'm sure it's out of warranty.

THX.

The sequence of "three" blink it's memory.

HP Notebook PC - computer do not Start and emits a LED or beep Code

Caps Lock/Num Lock 3 Memory Non-functional memory module error

Reinstall the memory modules (see next section).

Test the memory in BIOS or UEFI.

Replace the bad RAM.

Service

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