So remove the laptop memory and replace it with another slot. If you have two memory modules, unplug them one by one and try again one by one. It is possible that one of the two is broken. Slot Memory Switch If you can not remove the memory modules and test them individually, this is not a memory error. Laptop Battery Remove the hard drive and DVD drive and turn on the laptop without them.
Alternatively, unplug the laptop’s video cable from the motherboard and reconnect the laptop to the external monitor.
If the external monitor is working properly, there may be something wrong with the laptop’s display panel. Hard Drive If you still can’t get rid of the DVD, you can try another wireless card. Modem Remove the keyboard and restart the laptop. Also, nothing is appearing on the external monitor. Finally, disassemble the laptop and disassemble the motherboard.
In the picture above, the video card is integrated into the motherboard. The CPU has a heatsink and a cooling fan. The memory module is also good. The DC Power Adapter also works well. The CPU Cooling Fan only starts when the power is turned on. If nothing appears on the monitor (95%) it is likely that the motherboard is bad.