T420 Won't Wake Up
Posted: Sat Sep 19, 2015 7:32 pm
It's a very rare occasion I can get my T420 to wake from sleep. Whether I close the laptop regardless of AC adapter state, or it goes into sleep mode because the battery level has gotten too low, it has about a 1/10 chance of not getting stuck in sleep mode.
If it's because I closed it while plugged it or the battery is fine, I find if I wait about 30 seconds and then open it again I have a good shot at getting back in. Too quick and it gets stuck. I've never tried between about a minute and a couple hours but if it's closed for a couple hours, no good.
If it's because it ran out of battery, I have to plug it in, wait for the power button light to blink about a couple times, and then hold it firmly for a second. Then I get back in every time. But if I do it immediately or let it stay like that for too long I can't get in.
A long time ago I flashed a modded BIOS to allow other wireless cards. I never ended up replacing the wifi card so I would inot be surprised if it was the modded BIOS, but I am curious if any other T420 owners experience this.
It has been happening for a long time but out of habit I don't like to let laptops sleep while I don't use them for a while, I always shut down and reboot later, so it's not been that terrible an issue to me aside from when I accidentally let it sleep or mess up the wake up process.
If it's because I closed it while plugged it or the battery is fine, I find if I wait about 30 seconds and then open it again I have a good shot at getting back in. Too quick and it gets stuck. I've never tried between about a minute and a couple hours but if it's closed for a couple hours, no good.
If it's because it ran out of battery, I have to plug it in, wait for the power button light to blink about a couple times, and then hold it firmly for a second. Then I get back in every time. But if I do it immediately or let it stay like that for too long I can't get in.
A long time ago I flashed a modded BIOS to allow other wireless cards. I never ended up replacing the wifi card so I would inot be surprised if it was the modded BIOS, but I am curious if any other T420 owners experience this.
It has been happening for a long time but out of habit I don't like to let laptops sleep while I don't use them for a while, I always shut down and reboot later, so it's not been that terrible an issue to me aside from when I accidentally let it sleep or mess up the wake up process.