Lenovo X201 shuts down after few seconds

[Thermaltake]

Hi, I got x201 Lenovo, and it powers up just first time I insert AC in it, and shuts down after few seconds no matter if it's in BIOS or on boot screen.
And after that I can't turn it On again, I need to unplug AC and plug it back and then it powers up but shuts down after few seconds again. Any clue what that can be ? I got it like that.

[mon2]

Re: Lenovo X201 shuts down after few seconds

Hi. Could be many things.

What is the history of the unit?

Any liquid damage ?

Over time, capacitors go bad that can cause these symptoms. Could be bad / brittle solder joints from the rather high currents of the switching power supply rails.

Try the following:

1) power down the unit. Remove the battery from the logic board. Then apply your power adapter. Turn it on. Does it turn on and remain on? If yes, battery is a suspect. If the issue continues, something else is a factor. Keep the battery removed.

2) Remove the power adapter. Place your meter in resistance mode. Check the resistance to ground on each coil on the board. If the resistance is too low, there could be a badcap that is causing a high current event to the local switching regulator which leads to a shutdown or chirp mode to protect itself from damage. Could also be the coil itself with a poor connection to the logic board. We have seen hairline cracks in the solder of such coils.

3) Power adapter is original / suitable for this unit? If the adapter is underrated for its current, the power supply may be turning itself off as the target is demanding too much current. I believe that you need a 65W or higher to power this laptop but please check your specs for the unit.

Report the findings from the above testing.

[Thermaltake]

Re: Lenovo X201 shuts down after few seconds

Hi. Could be many things.

What is the history of the unit?

Any liquid damage ?

Over time, capacitors go bad that can cause these symptoms. Could be bad / brittle solder joints from the rather high currents of the switching power supply rails.

Try the following:

1) power down the unit. Remove the battery from the logic board. Then apply your power adapter. Turn it on. Does it turn on and remain on? If yes, battery is a suspect. If the issue continues, something else is a factor. Keep the battery removed.

2) Remove the power adapter. Place your meter in resistance mode. Check the resistance to ground on each coil on the board. If the resistance is too low, there could be a badcap that is causing a high current event to the local switching regulator which leads to a shutdown or chirp mode to protect itself from damage. Could also be the coil itself with a poor connection to the logic board. We have seen hairline cracks in the solder of such coils.

3) Power adapter is original / suitable for this unit? If the adapter is underrated for its current, the power supply may be turning itself off as the target is demanding too much current. I believe that you need a 65W or higher to power this laptop but please check your specs for the unit.

Report the findings from the above testing.

Hi, I got this laptop like that so I don't know the history of it. From outside and inside there is no liquid damage.

I will disassemble it when I find some time and check physically motherboard for any damage or burns.

I already remove battery and try without it, no changes I even try few adapters 65W and 90W which I know are tested and OK, and still same thing.

I even noticed that without turning the laptop On, when I connect charger(without battery in it) led indicator turn on like there is no battery which is OK, and that green led beside yellow battery one and it turns itself off after few seconds. And happend when laptop is Off, it's like same thing happend when it's On and when it's Off. And after that happend you can't turn it On again, only If I disconnect AC and reconnect again.

I will try to measure it, but I don't have time for it, so I will try to ask someone to do that for me.