I have the exact same problem...

Unplug, remove battery, check for dust in fans and vents, plug in, try to reboot. If it powers up, open Control Panel, Power Options Power , set to High Performance, open Advanced Power settings, set Sleep and Hibernate to Never, Adjust other Advanced settings to your preference. Has it been pulled by the cord? If you have a multimeter check for DC volts at the AC jack plug, that plugs into the laptop. Is the Transformer (brick on the cord) getting warm when plug in? Does the battery charge LED light? Try another cord with the EXACT same power specs.

Game Boy Advance SP - Charging Light Won't Display If the orange-colored charge light on your Game Boy Advance SP is no longer coming on when the A/C Adapter is connected to your system, please use the following troubleshooting steps.

Troubleshooting Steps:

1. Make Sure the Game Boy Advance SP Isn't Already Fully Charged
   If the battery is already fully charged, the light will not display when the system is plugged into the AC Adapter. Play a game without using the AC Adapter for at least 10-15 minutes, then plug the AC Adapter in, to see if the light comes on. If it does come on, the battery was fully charged. If the light still does not come on, see Step 2.



2. Make Sure the Outlet You Are Using Works
   Plugging another electrical device into the outlet is a good way to check if the outlet works, or that the outlet you are using is not controlled by a nearby light switch. You may also want to try a different outlet.



3. Try a Different Licensed AC Adapter
   If the charging light doesn't display, try a different AC Adapter, if possible, to determine if perhaps the problem is with the adapter.
   
   
   • If a different AC Adapter works, you will need to get a replacement AC Adapter from our Online Store, or by calling our Consumer Service Department at 1-800-255-3700.
   • If a different AC Adapter doesn't work, or if a replacement AC Adapter is not available and the lights will not display, we recommend having your Game Boy Advance SP repaired. Check out our convenient repair options.
   
   


Note: Please be sure to include both the Game Boy Advance SP and the AC Adapter with any repair

try turnning it on but press F8 and look for configuration

Replace the battery

try a new AC adapter

The Charging circuit on the main board is dead. Either replace the main board or repair it if you have the skills and equipment.

there may not be anything wrong with the batteries and circuit board at all. you may have a bad motor

Did you charge it overnight? The battery was probably too dead for it to turn on. Or, your charger or battery may be bad. Try using another charger and if that doesn't work, replace the battery.

If the docking station is not charging the laptop while docked, it may simply need to be plugged in using the power cord to recharge the battery.