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1st : you can check from the power cable charge
2nd : check the adaptor charger if there is a light indicator or not, or you can check with multimeter to check the voltage on charger adaptor, does show the proper voltage for your laptop, you can check at the end of the connection that leads to the laptop.
note : Remember use DC current at Multimeter
3rd : if the adaptor running well, just plug on the adaptor charger to the laptop, dont turn on the laptop power, just see the light indicator with battery / lightning image on laptop, its explained that there is or is not the power current running to the laptop.
3rd.A : if its no power goes to the laptop then your adaptor charger is failed
3rd.B : if is there, there must be a problem with your motherboard, section power / power plugs, why do not want to charge with a new battery.
- if the problem on number 1 & 2, then you can change the power cord and the adaptor charger.
- if there is problem on the 3rd.B then you can go to the toshiba services center for your problem.
The bios will and does not affect battery charging. Battery charging is carried out before the system and is a switch mode charger on board before the processing. If it required the processor to work and a bios, it would not charge when switched off!
I would suspect the OEM battery for the flashing light but the laptop should switch on with just mains power.
Has it been overheated?
Whenyou connect the power adapter into the laptop, does the power LED light up? Ifnot then -
The battery adapter or the adapter's power lead or the laptop's powersocket could be faulty.
Check power adapter's DCplug that connects into the laptop power socket with a multi-meter, the voltageshould be slightly higher than the voltage that is printed on the label on thebottom of the adapter. If the voltage is zero or way below the voltage that isprinted on the label then the power adapter is faulty and needs to be replaced.
If the adapter is OK thenconnect it to the laptop and power it up, then look at the power/batterycharging LED light and wriggle the power plug in the laptop's powersocket. If the power/battery LED light flashes and in a certain position thisLED light stays firm, then the power socket is either faulty or it has a drysolder joint where it is connected to the motherboard.
This can be repaired but itrequires the laptop to be completely dismantled to get at this power socket andrepair. If you cannot DIY then I suggest you get a quote first.
THE SYSTEM SHOULD BE CONNECTED TO POWER SUPPLY AND REMOVE THE BATTERY AND TRY TO ON THE SYSTEM .IF IT BOOT THEN AFTER THAT INSERT THE BATTERY SO THAT IT CAN CHARGE VERY WELL OR CHANGE THE BATTERY....OK RATE THIS SOLUTION