Technical Support 820-2337-a

[Tara Laptops]

pls can anyone provide technical information for 820-2337-a board.
In all i have 4 boards. In 2 boards all lights, power supply , fans , graphic card fan gets on fine but on display.
In two boards nothing get on. when i press the diag led switch one orange led blinks for once.
Pls share the technical information. Also i find totally 4 bios. 1- U8700 , 2- UB301, 3-UC650, 4- UB201. Any idea what each does. Pls reply. Thanks

 

[Notebook Centro CHILE]

pls can anyone provide technical information for 820-2337-a board.
In all i have 4 boards. In 2 boards all lights, power supply , fans , graphic card fan gets on fine but on display.
In two boards nothing get on. when i press the diag led switch one orange led blinks for once.
Pls share the technical information. Also i find totally 4 bios. 1- U8700 , 2- UB301, 3-UC650, 4- UB201. Any idea what each does. Pls reply. Thanks

It may already have reached the end of its useful life

 

[Tara Laptops]

here still plenty of machine need repairing. I need some technical support. If any information pls share