I have a L420 that gets stuck at the thinkpad logo when booting. It is inconsistent,sometimes it boots ok and doesn't get stuck or other times it will do a steady beep for 30+ seconds and then boot.
It seams unlikely that a key is stuck. This computer is in like new condition and nothing has been spilled on it. The problem happened after I let computer sit for a couple years.
I tried upgrading to windows 10 but I didn't do full clean install. I also tried western digital hdd diagnostic from ubcd. I am running memtest now but no errors.
I wanted to try a bios update but I can't get utility to work. I cant find a way to manual install. Lenovo solution center does not show a bios update after running "system update" I am running bios version 1.16
This is the bios utility I tried to use. http://support.lenovo.com/us/en/downloads/migr-77079#os
Maybe i need to revert back to windows 7 to use this utility?
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L420 gets stuck at splash screen or steady beeping.
Re: L420 gets stuck at splash screen or steady beeping.
I restored back to windows 7 and was able to get bios update utility to work. After bios update I did a fresh install of windows 10 64 bit. (I had windows 7 32 bit) It seams ok so far. I think bios may have been corrupt. Not sure why it would do that after sitting. It was fine before I stored it.
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Re: L420 gets stuck at splash screen or steady beeping.
Could be a case of "bit rot". Flash and EEPROM memory, even though they are supposed to be non-volatile, can sometimes flip states over time.
Ray Kawakami
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NOTE: All links to PC-Doctor software hosted by me are dead. Files removed 8/28/12 by manufacturer's demand.
X22 X24 X31 X41 X41T X60 X60s X61 X61s X200 X200s X300 X301 Z60m Z61t Z61p 560 560Z 600 600E 600X T21 T22 T23 T41 T60p T410 T420 T520 W500 W520 R50 A21p A22p A31 A31p
NOTE: All links to PC-Doctor software hosted by me are dead. Files removed 8/28/12 by manufacturer's demand.
Re: L420 gets stuck at splash screen or steady beeping.
Pretty confident i have it fixed. I spent all night on it and posting from it now,no problems.
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