Power is pulsing ,lights fans etc

I bought a x100e dirt cheap,and i see why.

When plugged in powerbutton and battery light flash ,fan speeds up slowsd down and so on and the hdd tries to start. I tried numerous powersupplies.. i dont know whats going on..

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I had bios batter reset beforehand but it looks like something on motherboard is faulty

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Hi @krusty0921 ,

You may have a flat (no pun intended) backup battery.

Here is a link to the service manual for your laptop. Go to p.33 to see how to check the backup battery.

Before you take apart the laptop to get to the backup battery try a power reset and see if that might get the laptop working.

Here's how to do it.

Remove the charger, remove the battery, press and hold the power button for 30 seconds, reconnect and switch on the charger (leave the battery out at this stage) and start the laptop.

If it starts allow it to boot all the way to the Windows desktop (if an OS is installed), when HDD activity settles shut down the laptop in the normal manner.

When it has completely shutdown, switch off the charger, re-insert the battery, switch on the charger and start the laptop.

If it starts allow it to boot all the way to the Windows desktop (if an OS is installed), when HDD activity settles, check the charging status of the battery. if charging, allow it to fully charge before switching off and disconnecting the charger.

If the above doesn't work, try removing the battery, the HDD and the ODD and see if the laptop starts on the charger. Enough to get into BIOS anyway. If it does you may have to prove which of the hardware components that were removed is the cause of the problem.

If it still won't start correctly at all and the backup battery tests OK then you may have a motherboard problem or perhaps a corrupted BIOS problem

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Hi @krusty0921 ,

Can you check if there is a BIOS 'reset' or 'restore' jumper on the motherboard?

I cannot find it in the service manual but on some Lenovo desktop motherboards there is a jumper that you either move to another set of pins or remove which resets the BIOS from a copy that is stored in the BIOS eeprom. Usually it is a 3 header pin arrangement with a jumper. Just a thought.

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