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Here we show the repair of a HP brand laptop. It was working one day and was turned off and when trying to turn it on the next day it did not turn on anymore. It came to the repair shop and indeed the system would not boot, only the LEDs would light up, and the screen gave no signs of life, after about 20 seconds the two white LEDs began to blink, it is next to the caps lock button and the numeric keypad lock button, and it does not even let you reset it, only by removing the AC and battery. The video arose because I found many users in the HP help and support forum who complained that their lap had become unusable and that it was a piece of junk. Well, I solved the fault and decided to make a video telling them how to try it. It is due to a RAM memory failure, the chip set does not detect the RAM and it bugs and there is not even a light on the screen (back light). I hope it helps and revives your lap since from my point of view it is a good machine.