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flaviustech

New Member

Join Date: Jun 2025

Posts: 4

Country: Romania
#50181

Today, 01:56 PM

Hello,
Flavius Tech is disturbing this forum, my intent is too learn how to repair only x1 carbon ultrabooks, from beginer to advanced electronic repairs.
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please help friends thinkpad T470 error post "bottom cover tamper detection error"

by fredyjbi

please 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 you

1 Photo
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
06-15-2024, 09:56 AM
please help friends thinkpad T490 NM-B901 rev 1.0 dead no power usb type C 20v 0amp thank you

by fredyjbi

please help friends, I have 3 T490 units with the same case, the USB type C is completely dead, showing 20v 0 amp, loss of voltage VINT20_IN resistance to ground is fine, thank you

I think the problem is that I lost the voltage at PQ0008 pon 1 -PWRSHUTDOWN which should have been high which was picked up by R9512 VCC3SW, thank you very much for your help

PF0002 20v
PQ0005
pin 5 20v
pin 1.2.3 19.8v
pin 4 19.8
resistance
source & drain 2,4 m
source & gate 100k

PQ0006
pin 1.2.3 19.8v
pin 4 19.8v...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
04-20-2024, 11:40 AM
please help friends x1 yoga 7th no display beep melody thank you

by fredyjbi

please help friends x1 yoga 7th no display beep melody thank you...
- Channel: BIOS Requests ONLY!
04-17-2024, 03:14 AM
please help friends clean me bios x1 yoga 7th no display melody beep, thank you

by fredyjbi

please help friends clean me bios x1 yoga 7th no display melody beep, thank you
- Channel: BIOS Requests ONLY!
04-17-2024, 02:58 AM
Please help friends, thinkpad t480 nm-b501 is dead

by fredyjbi

Please help friends, thinkpad t480 nm-b501 is dead, help me fix it, thank you
usb meter 20v 0.00 amp, after I took the VSYS measurement the drop was only `9.2v which should have been 10.2v I measured from a normal matherboard machine, the VSYS path resistance to ground diode mode is 1900 thank you

LINK to Schematic -> https://www.badcaps.net/forum/troubl...b501-schematic
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
04-16-2024, 08:34 AM
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