Sometimes cannot wake up my Thinkpad T420 from sleep mode

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ccc · #1 Post by **ccc** » Wed Jan 20, 2016 12:33 pm

Hi

My notebook Thinkpad T420 (4236-N3G) with WIN7 PRO 64-bit and 8GB RAM goes to sleep and sometimes happens, I cannot wake up using keyboard or mouse.
There is no SSD inside, just a normal Toshiba MK3261GSY hard disk.
The newest BIOS Update is already done and "Power Options" in Windows are on default.
Has anyone similar problem or knows howto solve it?

dr_st · #2 Post by **dr_st** » Wed Jan 20, 2016 1:13 pm

When this happens, can you still wake using power button / Fn key?

ccc · #3 Post by **ccc** » Wed Jan 20, 2016 1:49 pm

dr_st wrote:When this happens, can you still wake using power button / Fn key?

No, I cannot.

dr_st · #4 Post by **dr_st** » Wed Jan 20, 2016 2:56 pm

OK, does it get stuck with the little moon LED lit, or is that also off?

ccc · #5 Post by **ccc** » Wed Jan 20, 2016 3:09 pm

dr_st wrote:OK, does it get stuck with the little moon LED lit, or is that also off?

If it hangs the LED is still on.

agarza · #6 Post by **agarza** » Mon Feb 15, 2016 9:56 am

Sounds like a mobo problem

While my T420 was still on warranty it refused to wake up on standby or even to power up, I would power for a few seconds and then It will die. The ultimate solution was to replace the mobo.

Sometimes cannot wake up my Thinkpad T420 from sleep mode

Sometimes cannot wake up my Thinkpad T420 from sleep mode

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