My HP EliteBook 820 G3 Won't turn on

[Redevelop]

I have an HP EliteBook 820 G3 laptop. Previously, I had this laptop repaired at a service center. After the repair, the laptop frequently experienced blue screens. Then, after some time, the laptop completely died and wouldn't turn on. When I tried to turn it on, the laptop would power on, off, on, off, on, and then turn off again. This kept repeating. I decided to open the laptop to see what was wrong. I found an 8GB RAM installed in the slot, and I saw that the RAM frequency was 2666MHz, whereas it should be 2133MHz according to the laptop’s specifications. So, I bought new RAM that matched the laptop's specifications. However, the laptop started beeping several times, as if the RAM was not detected. When I tried using the old RAM again, the laptop didn’t beep, but it kept turning on and off. What is the solution?

[BeemerBiker]

Take the original memory out clean the contact edges, use an air duster on the motherboard put the memory back in.

• Turn on the computer by holding the power button down for 20 full seconds then release.
• Press the Power button one more time (if necessary) to start the computer.
• Tap the ESC key about once a second after you see the LEDs on the keyboard flash.
• Press F2 to run diagnostics: (v) 2.6 or later is recommended.

Makes sure you can pass the memory and disk test. If you cannot run the diagnostics or a component fails the you have a hardware problem.

Let me know if you can pass diagnostics.