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Boot problems with gaming Laptop (LENOVO Legion 5)

43 views 2 replies 3 participants last post by  MPR  
#1 ·
Hello everyone, I'm not sure this is the right category for my post, but in case I'll be happy to move it elsewhere.

I'm wrapping my head around a very misterious mulfunctioning from my three-year-old Lenovo Legion 5.

I've never had any issue with it untill one evening in which, out of the blue, it wouldn't turn on (turn-on button lights up, but no keyboard lights, no sound from the fans). I try multiple times, but the computer seems dead. I fear a major fault in the motherboard.

I bring the computer to a technician. He can't detect any visible hardware problem. He flashes the BIOS and changes the CMOS-BIOS battery, then tells me the computer is up and running.

I bring the computer home and use it for a couple of days, everything seems back to normal. I unistall some app and reboot: the computer turns off instead and goes back to the original condition (black screen, no lights from the keyboard, no fan sound). Same thing happens if I turn off the computer and try to turn it on again.

BUT (here is the weird part): I discover by accident that if I wait a little bit and try again, the computer boots normally. When windows loads, the computer runs seamlessly: CPU, GPU, RAM seem to work like clockwork. Only thing is that the windows clock seems not to be working while the computer is off, so I have to put it back in sync everytime. But the BIOS battery has just been replaced. I checked the time also in the BIOS screen and it seems more precise than the windows one, but I'll have to check again.

I start thinking that it might be a corruption of the OS, so I proceed to clean the SSD and reinstall windows from scratch. The situation stays identical.

So, after a few days of tests, it seems that if I try to turn on the computer right after I turn it off, it will not start. I also can't do a reboot anymore because it will just turn off instead. But if I wait 5 minutes before turning it back on, it will work again (only with a clock out of sync), but overall perform perfectly.

I could keep using the computer like this, but I'm afraid it will get worse and I am genuinely curious to find out what's the cause of this. At this point I really have no idea if it's an hardware, software or BIOS problem.

What do you think?

Thanks for your help!
 
#2 ·
A computer that is not keeping time is a symptom or a bad CMOS battery.
I would take it back to the repairman and have him diagnose it. You paid for service, they should fix it.

If they won't honor their service warranty, and you feel comfortable removing the bottom plate, and disassembling the motherboard from the computer, You can make sure the connection to the CMOS battery is in tight. You can even purchase a new one from Ebay.

You can also remove the RAM, blow out any dust in the RAM slots with a can of Air.
Wipe the RAM contacts with a dust free cloth, or take an eraser, and rub it on the contacts, wiping afterwards.

Assemble it and boot into Setup (Bios) make sure the time is correct. Set Bios to Defaults, Save and Exit.
See how it goes.

 
#3 ·
If you keep having to re-sync the clock then either the CMOS battery isn't good, isn't connected properly, the RTC circuit is bad, or some software is causing the clock to go out of sync. You may have to install a new CMOS battery, or at least test the one you have. Just because a computer shop installed a "new" battery doesn't it was actually a good one.

You may also have a more serious problem with the hardware or hardware setup. The CPU, GPU, and chipset's thermal pads may have dried up and are causing an overheating issue that becomes rectified once the system cools down. A cracked solder joint might also open up when hot and close when cool too as may a failing component also start working once it cools down. Or, it might just be that your storage drive or RAM may need to be re-seated.

The problem might lie with Windows or its settings. It never hurts to perform some basic system maintenance.

1. Run an online virus check with Eset. Click One-Time Scan.

2. Go to Start and search for "Disk Cleanup" and run it.

3. Go to Start and search for "cmd" then right-click the app and select Run as Administrator. Enter the following in the order given (just copy and paste them). The last will require a re-start.

Dism /Online /Cleanup-Image /RestoreHealth

SFC /SCANNOW

CHKDSK /F

4. Disable Fast Startupt. Look in the BIOS too as it may have its own fast startup setting.

Search for and open the Control Panel, then navigate to Power Options > Choose what the power buttons do. Click on Change settings that are currently unavailable under the shutdown settings, uncheck the Turn on fast startup box, and then click Save changes.

5. Reset your BIOS to its default settings.

To reset the BIOS on a Lenovo Legion 5, shut down the laptop, then boot it up while repeatedly tapping F2 (or F1). Once in the BIOS setup, press F9 to load default settings, and then F10 to save and exit.

Check the CMOS battery and re-seat the CMOS battery, main battery, RAM, and SSD connectors.