and stays off.
Shut down normally last night, today I pressed the button as usual to
turn it on, but it doesn't respond.
The only thing that happens is when you unplug the power adapter and
plug it back in again, the power button light and the red dot in the
cover flash three times.

Does anyone have any idea how I can track down the problem?

Technical data: Lenovo Thinkpad T560 (20FH-CT01WW)

--
Greetings
Alex

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Alexander Goetzenstein <alexander_goetzenstein@web.de> wrote:

and stays off.
Shut down normally last night, today I pressed the button as usual to
turn it on, but it doesn't respond.
The only thing that happens is when you unplug the power adapter and
plug it back in again, the power button light and the red dot in the
cover flash three times.

That sounds like a code that will be explained in the hardware
maintenance manual for your model: https://thinkpads.com/support/hmm/hmm_pdf/T560_P50s_hmm_en_sp40k04930.pdf
(I haven't checked myself)

Does anyone have any idea how I can track down the problem?

If the flash patten isn't revealing, I'd first open it up and
reseat the connector to the board with the power button. If the
the motherboard is ignoring the power button signal, then try
disconnecting anything connecting to it, including switching
the RAM for a spare stick, the CPU too as a last resort (if
you conveniently have a spare).

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#_ < |\| |< _#

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Alexander Goetzenstein <alexander_goetzenstein@web.de> writes:

The only thing that happens is when you unplug the power adapter and
plug it back in again, the power button light and the red dot in the
cover flash three times.
Technical data: Lenovo Thinkpad T560 (20FH-CT01WW)

I had this problem recently with an X260. The red dot flash just
indicates that the power has just been plugged in. In my case, the
problem was that the battery was empty, and the power adapter was not
supplying power (despite being recognized as present). I had another
compatible power adapter, and plugging it in solved the problem; the
original power adapter was dead.

--
Jason McBrayer | “Strange is the night where black stars rise, jmcbray@carcosa.net | and strange moons circle through the skies,
| but stranger still is lost Carcosa.”
| ― Robert W. Chambers,The King in Yellow

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