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Blank screen and flashing LEDs (ProBook 470 G3)

HP ProBook 470 G3 Notebook PC
Microsoft Windows 10 (64-bit)



today i tried to start my notebook (HP Probook 470 G3) and it first played some beeping sound with a blank screen, after i took the battery out, since this was the first time this happened to me. And tried turning it on again caps and num lock LEDs flashed five times. Now I have tried taking out the battery and adapter and draining the computer but it still wont turn on. I took out the RAM modules and repositioned them on the other slot, and even took out my wifi and M.2 hard disk (I recently put in) and tried draining it, and it still wont turn on.


Edit: After the flashing stops, the fan turns on and starts gradually increasing to the maximum, and cold air is coming out so it isnt overheating or anything.


Thank you

Regents Professor
Regents Professor
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Blank screen and flashing LEDs (ProBook 470 G3)

Can you match the sequence of 'blinks' to those shown in the table below.




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