Lenonvo T410 battery problem

Hi,

Hi have a T410 with a 70++. Since a couples of days it will not charge.
I plugged the battery in the T420 I have and the battery charges fine.

The Lenovo Power Manager says I'm using anywhere from 135watts to 2 million watts. When I turn off the computer and unplug it, the green plugged in light stays on.

I reinstalled the lenovo power manager and power driver also the windows driver, same problem.

I have to remove the battery and put it back in again so that it will go off. When the laptop is turned off it does not charge either. I figure it's a motherboard issue. Any ideas? If it's a board issue, does anyone know what type of part needs to be replaced (my uncle can weld anything, but needs to know where the problem is)

 

I don't think a welder can help here.

Unless you want to spend more than the notebook is worth, I suggest taking it for an estimate to a Lenovo service center.

But for an almost 5 year old notebook, it may be better to simply start looking for a new one instead of repairing this one.

See:
http://www.amazon.com/Lenovo-ThinkPad-20DF002YUS-15-6-Inch-Laptop/dp/B00SCAYW2M


Similar (raw) performance to what you have now, for only ~$400.

Good luck.

 

Replaced the jumper for the back light on a t420 screen for 45$. If I know where to look, it will be cheaper

 

Swap the adapters and retry. Every battery needs a minimum 'kick-off' voltage and the T410 adapter could be failing to deliver that. If this didn't make a difference, then you need to re-solder the battery connector or apply some contact cleaner on the pins, whichever works.

Hm ... does the T420 battery charge in the T410?

 

Good Idea, I'll try the power adapter from the T420 tonight. I did notice that when I unplug the power adapter, on battery, the power manager says 20-25 watts.

 

Just gave it a try with the T420 power adapter and it does not work. Removed the battery and left the power adapter in and the wattage still fluctuates between 100-180watts. The power adapter that comes with these notebooks is 65watts which is more than ample as the laptop normally consumes 8-30 watts. I know the battery won't charge if it detects that the power adapter has insufficient wattage to power the laptop. Is there some sort of logic chip that reads a wattage output?

 

The other adapter read 2MW, right? So the battery is fine, but there's something amiss with the T410. Try a kill-a-watt or the like, something that will show power fluctuations from the socket. Some its large capacitors may have failed, check for signs of that. Old type, though, more likely you have mainly film capacitors (on the left).

Other than that, a component may be shorting. Remove as much as possible, while still having a booting system. Live usb is fine, just as long as you can check power draw. Try if it'll boot without display; backlight is high voltage.

 

To me it sounds like the fuse that controls the charging process has been blown.

If you can open up the machine and check those *really tiny* fuses with a multimer, you should be able to locate the culprit since it will be the only fuse with an "open" reading.

Good luck.