Thinkpads Forum

[b[/b]Hello guys, i have a t420 with 1.46 bios from oleh, i was playing vampire the masquerade when i received a memory management bsod and decided to modify my memory settings, i dont remember much from the memory management screen but i changed something from static to adaptable and from 3gb to nothing in other settings also on that screen. After that i saved the settings and rebooted, but now i dont even get to the thinkpad splash screen, and i stay on a black screen forever, how can i boot back to my os, all lights and the two drives work when i start the computer but nothing else. I have 1333mhz 16GB of ram from sun memory.

Thank you for your help.

I'd try to:

- boot with other memory stick
- reset the BIOS removing BIOS' battery

Here's the HMM:
http://download.lenovo.com/ibmdl/pub/pc ... 0i_hmm.pdf

No-beep symptoms
Table 5. No-beep symptoms
Symptom or error FRU or action, in sequence
No beep, power-on indicator on, LCD blank, and no
POST.
1. Make sure that every connector is connected
tightly and correctly.
2. DIMM.
3. System board.
No beep, power-on indicator on, and LCD blank during
POST.
1. Reseat DIMM.
2. System board.

Reset BIOS:
1. Remove AC adapter and main battery
2. Remove Bios battery
3. Hold down power button for 20 seconds
4. Connect AC adapter and start computer

Sorry for the late reply, thank you for your help, i removed the bios battery but i still dont get a post after connecting the pc to a powersource, what else can i do?

Same thing happened to me. I was messing around with some settings in the modded BIOS and bricked my system. I got 3-1-1-3 for beeps, and just a black screen (no backlight) with LEDs on.

I attempted to recover the BIOS using WINCRISIS (https://www.bios-mods.com/bios-recovery ... -recovery/) to no success.

I ended up buying a new mobo and swapping it out. Kind of a pain and now I'm wary of messing with modded BIOS.

Please let us know if you figure out a way to recover your system.