Hello everyone,
I'm pleased to share that I've successfully recovered my Lenovo T480.
As I mentioned earlier, I used an older version of the firmware, and everything worked as expected.
One important detail was to patiently wait for the system to boot, with the patched firmware, it took over 15 minutes, but eventually it started up and I was able to unlock it.
Many thanks to everyone for your support.
Xargon1975
Member
Last Activity: 05-19-2025, 12:07 PM
Joined: 04-06-2025
Location: Paterna, Valencia
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"Hi, I'm reading your post and you've given me a bit of hope.
Can someone share a BIOS for the T480 with a version earlier than 1.52, which is the one I currently have installed?"
My T480.
Type: 20L6-SDR213
Serial No: PF-14H8HB
...Leave a comment:
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Thank you for your response and for your assistance.
I attempted to patch the file you provided, but the issue persists.
The system plays the startup melody followed by a blank screen (no display output).
When I revert to the original file you shared, the device boots successfully, but the BIOS remains locked....Leave a comment:
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Hi, I've been trying to unlock my T480's BIOS for over two weeks now.
I followed all the instructions, tried AutoPatcher and other BIOS versions, but no luck.
I found out that if the CRC check is wrong, the laptop plays a beep and shows a black screen. I fixed that issue, but now I'm stuck at a stage where the laptop just shuts down.
If I restore the original BIOS, it asks for the password again and stays locked. What can I do???
Type: 20L6-SDR213
Serial No: PF-14H8HB
Bios N24ET77W (1.52 )
...Leave a comment:
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Thank you very much, I'll try to find a BIOS that matches my computer, hope I can do it. I've been trying to unlock it for two weeks now....Leave a comment:
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[B]Hello,
I have conducted multiple tests and arrived at the following conclusion, please correct me if I'm mistaken.
After patching the original BIOS on my T480 using Lenovo AutoPatcher, the system emits a melody and fails to initialize the display (black screen).
Reverting to the original BIOS dump allows the laptop to power on, but it remains locked.
Further investigation suggests a CRC32 checksum error in the modified BIOS. After correcting the checksum, the melody no longer occurs, but the system still fails to boot (persistent black screen followed by an automatic...Leave a comment:
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Hello, I need help. I can't unlock my T480.
Type: 20L6-SDR213
Serial No: PF-14H8HB
The BIOS is locked. I performed two BIOS dumps, and both were verified.
The chip is a W25Q128JVSQ, and I used a CH341A programmer. I then patched it, wrote it to the IC, read it back, and confirmed the file was written correctly.
I proceeded to boot the laptop, but there was no display. The buttons light up, a melody plays through the speakers, and then it shuts down.
I restored the original BIOS, and it locked again, but this time the screen turns on and it prompts for F1....Leave a comment:
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Hello from Spain, I found this forum while trying to unlock my T480. It's really nice to see everyone's goodwill here. Best regards.Leave a comment:
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Were you able to fix it? I have the same problem...Leave a comment:
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Were you able to fix it? I have the same problem...Leave a comment:
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Thanks for the comments!!!Leave a comment:
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Can you explain what reset you did? I'm getting the melody and a black screen....Leave a comment:
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Hello i´have a T480
Type: 20L6-SDR213
Serial No: PF-14H8HB
The BIOS is locked. I performed two BIOS dumps, and both were confirmed.
The chip is W25Q128JVSQ, and I used the CH341A programmer. I then patched it, wrote to the IC, read it, and confirmed the file was written correctly, which it was.
I proceeded to boot the laptop, but there is no screen. The buttons light up and a melody plays through the speakers; then it turns off.
I went back to the original BIOS and it locked again, but the screen boots correctly and asks for F1.
What could be the pro...Leave a comment:
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