Hp elitebook don't show anything on the screen

[sppednight]

My Laptop still black screen When I turn on, Only caps lock an num lock blinks 5 times, amber light connection, I've tried all tricks that I saw in internet, Like change memory, change graphic card, put an external monitor, clean fan memory, press power button for 30 seconds, try to use win + b, but no results, help me please!!!

 

[hang-the-9]

From what you tried, most likely thing is a bad motherboard. You can look up the error blink codes online to see what they show you.

 

[sppednight]

From what you tried, most likely thing is a bad motherboard. You can look up the error blink codes online to see what they show you.

According to the blink codes, Five times blinks means that my motherboard have some problem, blinks five time and after stop blink, I can use USB, open the DVD/ROW, but just a black screen..