Hello friends, could someone help, I have this thinkpad with that message when starting, I already disabled it from the bios but the message continues, I also cleaned the region for me but the problem is not fixed, I also measured the switch cover but it is working... does anyone have Any idea what it could be? I attached my dump in case anyone can help.
LENOVO T480 ERROR POST " bottom cover tamper detection error "
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Re: SOLVED LENOVO T480 ERROR POST " bottom cover tamper detection error "
hello friends, could someone help, i have this thinkpad with that message when starting, i already disabled it from the bios but the message continues, i also cleaned the region for me but the problem is not fixed, i also measured the switch cover but it is working... Does anyone have any idea what it could be? I attached my dump in case anyone can help. -
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Re: SOLVED LENOVO T480 ERROR POST " bottom cover tamper detection error "
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Re: SOLVED LENOVO T480 ERROR POST " bottom cover tamper detection error "
.Last edited by Vesko356; 04-20-2023, 04:41 PM.----------------------------------------------------------------------------------------------------------------------------------------------------------
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I have a Lenovo T470 that developed this issue after I had removed my bottom cover for a routine inspection. I can't get in my BIOS to disable the feature. I then out of frusteation, intentionally broke off that switch thinking it was bad. I did the bridge horizontally as shown in the photos, but my issue is still the same. Is there something I'm missing?
My T470 shows the message at POST about the cover being removed, allows me to press the ESC key, but does nothing else beside showing me a blank screen (you know the backlight is still ON). I can't access the BIOS or interact with the unit otherwise. Where is the BIOS chip on these units exactly? What tool would I need to READ and WRITE a stock BIOS to this where the feature might not be enabled?Comment
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I have a Lenovo T470 that developed this issue after I had removed my bottom cover for a routine inspection. I can't get in my BIOS to disable the feature. I then out of frusteation, intentionally broke off that switch thinking it was bad. I did the bridge horizontally as shown in the photos, but my issue is still the same. Is there something I'm missing?
My T470 shows the message at POST about the cover being removed, allows me to press the ESC key, but does nothing else beside showing me a blank screen (you know the backlight is still ON). I can't access the BIOS or interact with the unit otherwise. Where is the BIOS chip on these units exactly? What tool would I need to READ and WRITE a stock BIOS to this where the feature might not be enabled?
post the content of the bios chip, you need an SPI programmer, here's a video as an example...https://www.youtube.com/watch?v=DWWigscuQDYDue to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:
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Every donation made will go towards server fees and maintenance costs.Comment
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I have a Lenovo Thinkpad T470 with a now damaged tamper protection switch. I can't access the system BIOS to disable the error message as the unit hangs at the error (and then displays a perfectly blank screen when I press the ESC key).
What I want is a clean BIOS where I don't have that error message by disabling that check. I've attached the BIOS BIN files as extracted using two different tools (which give two different looking BIN files).
The serial number for the notebook PC is: PF13SDZP
The BIOS chip part number is: 25L12873F That's what I used for both of the programmers to READ the BIOS via a SOIC-8 clip, but two different looking BIN files were produced.
I really want to get back to using the Lenovo T470 once again, as it has been a good PC despite its age.
Can someone please assist in either providing a clean BIOS file or edit the ones I post here to ignore the check for the bottom cover being removed?Attached FilesComment
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I have a Lenovo Thinkpad T470 with a now damaged tamper protection switch. I can't access the system BIOS to disable the error message as the unit hangs at the error (and then displays a perfectly blank screen when I press the ESC key).
What I want is a clean BIOS where I don't have that error message by disabling that check. I've attached the BIOS BIN files as extracted using two different tools (which give two different looking BIN files).
The serial number for the notebook PC is: PF13SDZP
The BIOS chip part number is: 25L12873F That's what I used for both of the programmers to READ the BIOS via a SOIC-8 clip, but two different looking BIN files were produced.
I really want to get back to using the Lenovo T470 once again, as it has been a good PC despite its age.
Can someone please assist in either providing a clean BIOS file or edit the ones I post here to ignore the check for the bottom cover being removed?
Attached FilesComment
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Thank you for sharing this file. I flashed it and the end result was that the notebook PC booted with the following messages then got stuck after the mandatory option of pressing the "F1" to access the system BIOS to update the settings or reset to factory defaults:
0271: Check Date and Time settings.
0183: Bad CRC of Security Settings in EFI variable.
Press F1 to enter setup.
My T470 is the 20HD model then file you gave me says 20JN. I'm trying to find the electrical differences between the two unitsComment
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I think you have some problems with communication between EC and BIOS.
The laptop started ok, the bios is good.
I wonder if this laptop had a bios password and the patching wasn't finished...
So, I suggest to patch my bios file with lenovo autopatcher, write it to bios chip, boot and follow the instructions then write back the file I have sent to you.
This must work.
I never check the exact model of T470...20HD or 20JN...before writing this bios and worked every time.
After successfully started the laptop always updated the bios to the latest version based on the real service tag.
Good Luck!Comment
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by fredyjbiplease help friends thinkpad T470 board CT470 series NM-A931 error post "bottom cover tamper detection error"
I've already
flashed the bios clean me and updated from the Lenovo site, then removed the switch and immediately jumped the S3 from pins 1 to 4, 2 to 3 but the problem remained the same, thank you1 Photo -
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This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....-
Channel: Troubleshooting Computer Displays
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This specification for the Lenovo ThinkPad T480 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T480 boardview and T480 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...09-06-2024, 03:21 PM
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This specification for the Lenovo ThinkPad T480 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T480 boardview and T480 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...09-06-2024, 02:34 PM
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This specification for the Lenovo ThinkPad T480 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T480 boardview and T480 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...09-06-2024, 02:28 PM
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