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What's DOS?
Posts: 1
Registered: ‎04-02-2019
Location: SA
Views: 149
Message 1 of 2

W520 won't start: on/off button just flashes

Can't turn on w520. Power button flashes with 1s intervals
From power off, when press then round on/off button, the following happens:
1) power button starts flashing
2) DVD drive makes its startup noise.
3) power button continues flashing.

At this point nothing works, have to pull power plug.
No thinkpad splash logo, no way to get to bios.

Have tried the following:
1) removing power and battery for 10 mins
2) pressing the power button 30 times with no power or battery.
3) as above with 5s between presses.
4) holding down power button for 20s
5) removed all memory, msata , sata and DVD drive
Nothing had an effect.
Punch Card
Posts: 19
Registered: ‎03-19-2019
Location: US
Views: 114
Message 2 of 2

Re: W520 won't start: on/off button just flashes

Check to see if you left a disk in the optical drive.

What updates preceeded this event? 

This could be so many things.. did you try unplugging the hard drive and seeing if you could then get In the bios?

Try pressing F1 repeatably after pressing power on?

No beeps at all?

Test memory:

Boot a recovery disc?

Unplug and reconnect bios memory backup battery to default the bios?

What version of windows?


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