• Lenovo L460-NM-A651 , component missing , new bios , no display.

Danes je 2 Februar 2026, 10:21

Lenovo L460-NM-A651 , component missing , new bios , no display.

 Pravila foruma: Klikni tukaj za prikaz pravil na forumu

  1. Naslov teme mora vsebovati: proizvajalca naprave, poln model in kratek opis okvare.
  2. Sporočilo teme mora vsebovati: oznako tiskanega vezja (v primeru popravil strojne opreme), razširjen opis okvare, kaj je bilo preverjeno, zamenjano in/ali izmerjeno, sklep in vprašanje. Če ne morete najti oznake tiskanega vezja, morate prebrati TO TEMO. Če še vedno ne najdete oznake, prosim objavite kakovostne fotografije obeh strani matične plošče - potrebno je odstraniti vse folije in module, ki bi lahko zakrivali te oznake.
  3. Pred objavo nove teme, preberite vse teme v podforumu USPOSABLJANJA, in naredite predhodno diagnostiko na podlagi vsebine teh usposabljanj.
  4. Nalaganje celotnih navodil/shem, BIOS / firmware datotek, ali objavljanje povezav, ki vodijo do drugih spletnih strani s takšnimi datotekami, je SROGO PREPOVEDANO. Lahko objavite le majhen del navodil/shem, ali povezavo na BIOS datoteko v podforumu NEVERIFICIRANE DATOTEKE BIOS/EFI. V eni temi ne smete objaviti več kot eno stran navodil/shem. Datoteka ne sme vsebovati vidnih žigov "zaupno",, e-poštnih naslovov ipd.
  5. V eni temi lahko opišete SAMO eno napravo. Za vsako drugo okvarjeno napravo morate odpreti novo temo.
  6. Zahteve za sheme, boardview, fotografije matičnih plošč, datoteke BIOS-a ali servisne priročnike za storitve NISO DOVOLJENE. Če želite vprašati za katero koli od teh, odprite novo temo v podforumu ZAHTEVA ZA DOKUMENTACIJO & DATOTEKO BIOS/EFI.

#1 Lenovo L460-NM-A651 , component missing , new bios , no display.

Napisal/-a sebuncle • 5 December 2023, 15:44
Hello everybody
This laptop come with the bios chip torn off and missing , I repaired the tracks and put a new eeprom with this bios-> lenovo-thinkpad-l460-mb-lcfc-bl460-nm-a651-rev-1-0-uma-version-bios-plus-kbc-t58758.html?hilit=BL460%20NM%20A651
The laptop starts, without display and turns off after 10 seconds.
I noticed a little component unsolder (see photos) can you tell me where it should be located ?
I think it goes near the bios eeprom , I couldn't find any photos of this part to help me.
motherbard is BL460 NMA651 rev1.0
Many thanks

Slika

Re: Lenovo L460-NM-A651 , component missing , new bios , no display.

Napisal/-a Google Adsense [BOT] • 5 December 2023, 15:44

#2 Re: Lenovo L460-NM-A651 , component missing , new bios , no display.

Napisal/-a matic • 5 December 2023, 21:31
Hello!

At least two components are missing here:
Slika
A= Resistor 1kΩ/1%, package 0402 (probably; I'm not 100% sure)
B= Capacitor 100nF/10V, package 0402

Is the component you found a resistor? If so, what's its value?

#3 Re: Lenovo L460-NM-A651 , component missing , new bios , no display.

Napisal/-a sebuncle • 6 December 2023, 14:57
hello,
you just saw the component found is indeed a resistor of 1Kohm, I soldered the resistance and the capacitor in the place that you indicated ,but the problem is still present after 10S the laptop turns off without display.
best regards

I have take some voltage when laptop is on
PL 406 = 0V
PL7 = 1,3v
PL701 = 1v
PL408 = 1,04v
PL403= 0v
PL9= 1,5v

#4 Re: Lenovo L460-NM-A651 , component missing , new bios , no display.

Napisal/-a matic • 6 December 2023, 20:00
- Which chip exactly did you use for the BIOS?
- Measure the voltages to ground on all pins of BIOS chip, when the machine is turned on.

#5 Re: Lenovo L460-NM-A651 , component missing , new bios , no display.

Napisal/-a sebuncle • 7 December 2023, 18:25
hi ,
here's voltage
chip is 25Q64FV
Best regards

Slika

#6 Re: Lenovo L460-NM-A651 , component missing , new bios , no display.

Napisal/-a matic • 9 December 2023, 16:08
Do you have an oscilloscope?
If so, measure the voltages to ground on pins 1, 2, 5, 6, 7 of BIOS chip with an oscilloscope immediately after pressing to the power button.

#7 Re: Lenovo L460-NM-A651 , component missing , new bios , no display.

Napisal/-a sebuncle • 12 December 2023, 15:48
hi
i don't have an oscilloscope.
best regards

#8 Re: Lenovo L460-NM-A651 , component missing , new bios , no display. 

Napisal/-a matic • 15 December 2023, 15:00
Measure the power consumption (in mA) of the board in the following cases without battery connected:
a) Machine turned off.
b) Machine turned on with RAM memory connected.
c) Machine turned on without RAM memory.

#9 Re: Lenovo L460-NM-A651 , component missing , new bios , no display.

Napisal/-a sebuncle • 11 Januar 2024, 20:39
Hi , the problem is solved , a friend give another motherboard .
Thank you for your help
Best regards

Re: Lenovo L460-NM-A651 , component missing , new bios , no display.

Napisal/-a Google Adsense [BOT] • 11 Januar 2024, 20:39
Podobne Teme
HP omen 17 board DA0G3LMBCG0 rev: G - identifying missing resistors around Bios
Lenovo Lenovo V145-14AST power on but no display
Lenovo Ideapad 320 no display
  INNO 3D RTX 3080 TI FBVDDQ MISSING B23A-DN612-021  [REŠENO]
  MSI GE66 Raider 10UH - Component identification  [REŠENO]
Quanta X38C, Rev: G, DAX38CMBAG0 component identification

Kdo je na strani

Po forumu brska: 0 registriranih uporabnikov in 7 gostov

_______________________________
Vse pravice pridržane. Nepooblaščeno kopiranje vsebine te spletne strani ali njenega dela je strogo prepovedano.
Vse blagovne znamke, izdelki ali storitve, objavljene na tej spletni strani, pripadajo njihovim zakonitim lastnikom, so avtorsko zaščitene in se uporabljajo samo v informativne namene.