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4 Posts

03-13-2014

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T420S Stuck at Thinkpad boot screen - Cont. loop

2014-03-13, 6:34 AM

I was trying to fresh install Win 8.1. It has Win8 previously and was working fine.

 

After I plugged in the Win 8.1 boot usb, it stuck at thinkpad boot screen and cont. rebooting.

 

Only thing changed in BIOS is moving USB boot up higher and disabled Computrace. Earlier it was enabled.

 

I can still get to BIOS by F1.

 

Looked all the USB port. None of USB ports are damaged or pins shorting each other. I also tested the HD by putting in my other working T500. HD is fine. Restored BIOS to default as well but no luck.

 

Any idea?

Tried all the method including CMOS reset, but no help.

Thanks for the help!

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4 Posts

03-13-2014

CA

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Re: T420S Stuck at Thinkpad boot screen - Cont. loop

2014-03-13, 17:26 PM

Any one?

 

Tried taking RAM out, and it does beep. No issue with hardware.

 

 

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9605 Posts

12-27-2009

CA

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Re: T420S Stuck at Thinkpad boot screen - Cont. loop

2014-03-13, 17:55 PM
Does it complain if you boot but don't have a HDD or USB attached?

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
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10524 Posts

01-02-2010

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Re: T420S Stuck at Thinkpad boot screen - Cont. loop

2014-03-13, 17:57 PM
Make sure on the BIOS startup tab that the boot type is set to "both" or "legacy" and not "UEFI only"

Rich


I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.
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4 Posts

03-13-2014

CA

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Re: T420S Stuck at Thinkpad boot screen - Cont. loop

2014-03-13, 21:33 PM

No, it does stuck in the same loop. Continuously booting and showing Thinkpad boot screen again and again.

 

I took the HDD out and no USB connected. same behaviour with or without HDD.

 

In BIOS startup is set to both - Legacy and UFEI.

 

Only change I had made prior to installing Win 8.1 is turn off Intel Anti theft module under security in BIOS.

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4 Posts

03-13-2014

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Re: T420S Stuck at Thinkpad boot screen - Cont. loop

2014-03-15, 17:03 PM
Any one?
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7 Posts

10-14-2019

PK

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Re: T420S Stuck at Thinkpad boot screen - Cont. loop

2019-10-16, 20:18 PM

Hello...did u get this problem solved? Bcoz i have the same problem now...

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