Toshiba satellite l300 not charging, doesnt work on the power supply

Toshiba satellite L300 is connectting adapter on turn off machine how problem?

It sounds like you need a new power cord. The power cord may be giving just enough juice to charge the battery, but not enough to charge WHILE running. You can pick up a universal power supply from Radio Shack to diagnose if this is the issue. If it is, you can either keep the universal supply or return it and pick up a power supply from e-bay or toshiba.com. Just put in your model number with the toshiba link and look for "accessories", then find the power supplies.

change power settings in control panel

This is a middle pin issue, you will find the laptop doesn't charge either but will power the unit, if the power is connected, the laptop will hang and use reserve resources, if you unplug it, the machines performance will dramatically increase.

replace your power adaptor and all will be fine, i have had the same issue.

How about this step, try to turn off the laptop itself. Remove the cables and battery just like what you did before, then press and hold the power button for 10 seconds. Then, reinsert the cables and battery on the laptop and then turn on the computer itself. If the laptop restarts, shuts down or freezes with the AC power cables, two things that you should seriously consider. It might be the power cable itself, AC cable port or the circuitry going to the motherboard. And since you have cleaned out the fan and heat sink, you have isolated that problem. Have you plug-in another power cable on your laptop? If yes, then check if it works. Otherwise, the main issue is that the AC port is loose or the circuitry of AC adapter going to the motherboard is not not working. You can re-open the unit and check the circuitry from the AC port going to the motherboard. You may check the circuitry from AC port to the power supply if it is ok. If symptom persist, please contact your local dealer...

SIMPLY REMOVE BATTRY AND POWER SUPPLY
reconnect them
go to power options and check setting
"when i press power button"
select shutdown

The problem could be with the adapter and not the battery.

The pwr supply is not properly connected to boot up. might be a h/w or s/w issue also. check with the service center

I have had a this few times... what happens is the Contacts on the Socket for the power supply comes away from the Motherboard. Subsequently, it will not charge, nor power on... & then the battery gets so flat that it stops it all from working... You will have to get it repaired, it is a bit of a mission. & sometimes the damage done to the Motherboard precludes repair. So get a firm "Quote" from a reputable service center/man.

Toshiba Satellite R15-S822 Tablet: Battery is charged and operational power supply (charging light is on) is plugged into power port on back side of laptop: Problem is sliding "power on" switch does not start laptop - no sign of any electrical activity...