Does the Power LED half-circle light up?
When the power button is pressed once, and the power LED doesn’t turn on, first try resetting it. To reset the XO, remove all power sources from the laptop: • Take the battery out and remove the power adapter. • Wait two minutes. This allows embedded hardware to lose all power and reset itself. • Replace at least one source of power, either the battery or power adapter, and watch the power/battery LED while you do so. The battery LED should flash orange momentarily (about a quarter of a second) when power is first reapplied. If you do not see this flash, you either have a motherboard hardware problem or faulty EC firmware installed. Contact a repair center for assistance. If the power LED doesn’t turn on or flash, but the laptop proceeds to illuminate the backlight and even start, the problem may be either the LEDs themselves or the power LED driver. The LEDs are in series, so if one fails they may both fail to light. On rare occasions, the power button becomes stuck mechanically. In t
