Another T460s won't start

[johnmsch]

My daughter's T460s will no longer boot up. After spending hours searching this topic, I have tried everything I found.
I first thought it was the 2 batteries, which I just replaced with new ones.
When I plug in the charger, the green light by the charging port comes on.
Tried all of the steps I found, including:
Remove the new baterries
Using a paper clip to reset CMOS
Disconnecting the CMOS battery, waiting a few minutes, connect it back and put the batteries back in
Holding the power-on button for 30 seconds, then for 3 seconds
At one point, after hitting the power button, it flashed 3 times quickly
Still cannot get it to power on at all.

Any more ideas what I could try?

[RealBlackStuff]

Few more things to try:
- reseat RAM sticks
- booting without HDD/SSD
- external monitor in case the LCD is 'gone'
- another charger

[johnmsch]

Thanks for the suggestions, but still a no-go. The issue is that it won't even power on.
I don't have access to another charger that will work with this machine, but when I plug the power cord in, the green light on that port lights up. Wouldn't that mean that the unit is getting power from the charger?

[TPFanatic]

maybe your power button is broken.
can you test with a dock?

[johnmsch]

Thanks @TPFanatic, good idea. Can't find the old docking station, so I just ordered one from Amazon. At least I can return it if it doesn't work.
I did notice something today when troubleshooting again.
As mentioned previously, when I connect the charger, the green light next to the port does come on. I had the lid open when I just tried it again and noticed that the power button does blink 3 times when I connect the charger. Wondering if those 3 blinks mean anything.
Will report back after testing with the dock.

[TPFanatic]

a brief google search for lenovo forums results of similar symptoms is not looking promising... seems when other folks encounter this issue, they don't get any further than you.

https://forums.lenovo.com/t5/ThinkPad-L ... -p/5210817

https://forums.lenovo.com/t5/ThinkPad-T ... -p/5240221

worst case scenario the mainboard has given up the ghost. I feel like with the age of T460s and the low prices of replacement functional laptops even of newer generations, may be most economical to retire and replace the T460s.

[johnmsch]

Thanks for the info. The T460s is officially deceased. RIP old friend.