t430s strange boot problems

[reaper38]

Hello, yesterday my laptop failed to boot, just briefly lit power button and turn off again. Both power button and fingerprint reader give same result.
Today i got new feature, some sort of boot loop when power button lit up then thinklight flashes then darkness.
I got work around for it remove batteries and press power button for 30 seconds or just give it few hours to stay without power. If it powers once then it works normal.
Tried sleep mode same stuff, after few hours dead.
Any thoughts about what is going on?