All other Laptop Motherboard failures

A system board also known as motherboard or mainboard is the main circtuit board in any laptop. Unlike desktop PC system boards, laptop system boards come in thousands of different shapes and sizes. Laptop motherboards are model-specific. In other words, you cannot remove motherboard from a Toshiba laptop and stick it into a Dell laptop. All parts inside a laptop are connected to the system board, either directly via a connector mounted on the system board or through a cable

SYSTEM BOARD FAILURE SYMPTOMS.

When a system board fails, you may experience the following most common problems with your laptop.

1. The laptop is completely dead. There are no LED light activity when you press on the power button or plug in a known good AC power adapter.
2. The laptop starts but the video output on the LCD screen or external monitor is garbled. Most likely this is related to the VGA chip failure.
3. The laptop turns on without video on the screen and the power LED starts flashing.
4. The laptop works fine with AC power adapter but will not charge a known good battery. If that’s the case, most likely there is something wrong with the battery charging circuit or DC power jack.