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I have also problem with BIOS (power LED blinks 3 times, laptop does not turn on).
Lenovo T490, Type 20N3-S70A00, SN PF-26DD3V 20/03, motherboard NM-B901 rev 1.0
BIOS is in attachement.
Can anyone help me?Comment
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no power on my laptop on this bios
lenovo thinkpad t490
nm-b901
type 20n3-s88u0f
s/n pf-1x8pfj 20/01
another bios work ok but sound not workingComment
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Good afternoon, I need help with my BIOS. From what I've seen, this laptop's BIOS has already been tweaked. It came on without any video, the Capslock, Numlock, and Wi-Fi LEDs blink, and it beeps a few times. I tested the BIOS from post 15 and the power LED blinks three times, but it doesn't do anything else. I'll send you the BIOS that came with the laptop.
ThinkPad T490
Model: 20N3
S/N: PE05GWGQ
MTM: 20N3SCBJ00
Motherboard: FT490/FT492/FT590/FP531 NM-B901 REV1.0
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I have two Lenovo T490 that doesn't have an administrator password but has Autopilot. Is it possible to remove Autopilot?
Thanks a lot for your help!
Laptop 1:
Lenovo T490
Board: L1HF9C201BV
SN: PF20X204
Laptop 2:
Lenovo T490
Board: L1HF9AF07A9
SN: PF1ZS605Comment
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Hello,
Does anyone have a motherboard from the Lenovo T490 model FT490/FT492/FT590/FT531 NM-B901 and could take a picture of the CPU area, including all the components around it? I would be very grateful.
During the CPU replacement process, I messed up all the resistors and capacitors, and now I can't get it to work again. The motherboard was powering up before, but now it doesn't, even with the newly installed CPU. All voltages are okay, and I don't have any shorts, so I'm assuming I'm missing one of the resistors.
I've also followed the schematic and Broadview,... -
The board is:
FT490/ FT492/FT590/FT591 NM-B901
So when i press the power button, the keyboard , the power button, caps lock, numlock lights up for a second, fan spins , and it turns back off, that's it ...
Ok, so i opened it, i have 3.3V,5V,1.05V when charger or battery is connected, when i press power button, i get all the voltages on all the coils for a second, except VCCGFXCORE_I , if i read the schematics correctly there should be 1.2V,i don't know if this is or isn't important,because i don't know the sequence and is it a condition for... -
hello guys, can someone check the dump?
when power button is pressed, the keyboard and caps and power button went on for a second, and then died... then i tried flashing dumps i found, and now only gives 3 power light flashes when charger connected... i even restored original dump, and it only lights up power button 3 times....no keyboard light or caps or anything...
the chip is 25Q256JVEQ, 3.3V
the board is FT490/ FT492/FT590/FT591 NM-B901
the original dump is in the attachment... -
Lenovo T590
Model 20N5S0W300
SN PF1BXUWM
Mobo FP531
In a poorly executed attempt to re-program BIOS, I believe I knocked off SMD resistors near the BIOS chip (MACRONIX MX25L25673G) pins 1, 2 and 5. Since the resistors were low values, I attempted to make the repairs using solder blobs. I am inexperienced and the workmanship is admittedly poor. I programmed the BIOS chip with the initial firmware read I performed. In other words, I believe the BIOS firmware currently matches what it was prior to any work I performed.
Here are my current observations.- Board
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hi all! Greetings!
Benq fp531 monitor q5t3
1 .- I do not ON, nor led stanby.
Check in tl1451acn ic751
no voltage pin 5
pin 10 is 14 volts ...
any information on this
I would appreciate each other, help...
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