Hi, I have a t43 and recently i will only work on battery, when i plug in the AC adapter nothing happens.. i tested the power adapter and it is working fine, the outlet of the power adapter also working..
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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 dry solderjoint 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.
Take the battery out of the laptop & try to turn on the laptop
using power adapter only. If the computer turns on, then the battery is
defective & needs to be replaced. 2.
Make sure the power adapter is not defective. Test the output voltage
of the power adapter using a voltmeter. Compare the voltmeter reading to
the nominal value written on the adapter or the laptop. 3. Make sure
the DC jack is not loose or broken. A loose DC jack will need to be
re-soldered. A broken one will need to be replaced. 4. If you
have another processor which is compatible with your laptop's model, try
swapping processors & test to see if the laptop will work. 5. The power button could be bad. 6. The motherboard could be defective & needs to be replaced.
Check and verify the AC adapter is working.
If it is then you can try removing the battery with the adapter connected try to boot the laptop.
If it boots, reinstall the battery and check to see if it is charging.
Hope this helps.