• Lenovo IdeaPad L340-17IRH - nie uruchamia się

Danes je 3 Februar 2026, 16:47

Lenovo IdeaPad L340-17IRH - nie uruchamia się

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  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.
 Ta tema je označena kot ARHIVSKA. Odgovorite samo, če vaše sporočilo vsebuje rešitev (Pravila in Pogoji, 12.1).

#21 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a matic • 7 Marec 2023, 21:29
fifi88 napisal/-a:My programmer does not have an erase option.
Which programer exactly do you have?

fifi88 napisal/-a:Will programming a file with only FF give the same effect??
Yes, it will.

Re: Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a Google Adsense [BOT] • 7 Marec 2023, 21:29

#22 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a fifi88 • 8 Marec 2023, 11:03
matic napisal/-a:
fifi88 napisal/-a:My programmer does not have an erase option.
Which programer exactly do you have?

SAS Programer rev.2.2

fifi88 napisal/-a:Will programming a file with only FF give the same effect??
Yes, it will.

How to upload to KBC only FF. After reading in NCB are FF. But when I disconnect the power from the board and read it, then KBC looks like programmed.

#23 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a matic • 8 Marec 2023, 11:31
It seems the KBC chip automatically program itself with the content from the BIOS chip after connecting the power supply to the board.

Replace the PCH chip.

#24 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a fifi88 • 8 Marec 2023, 16:34
matic napisal/-a:
fifi88 napisal/-a:J5 release - 3,28V
J5 short - 3,28V
These are not the cases I asked for.

c) Before pressing to the power button = Machine on stand-by -> J5 opened.
d) After pressing to the power button = J5 briefly shorted for ~1 second and then opened.


I repeated the measurements. After shorting J5 for a second, the voltage on pin93 KBC drops from 3.28 to 0. But after about 3 seconds it returns to 3.28V

#25 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a matic • 8 Marec 2023, 20:16
fifi88 napisal/-a:I repeated the measurements. After shorting J5 for a second, the voltage on pin93 KBC drops from 3.28 to 0. But after about 3 seconds it returns to 3.28V
That's still not fine.
You can try to replace the KBC chip, but I think the issue is more likely related to the PCH chip.

#26 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a fifi88 • 16 Marec 2023, 16:28
I replace KBC. On pin 93 KBC, the voltage is 3.28 all the time.

#27 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a matic • 16 Marec 2023, 16:50
Check that the measurements from post #9 are the same with the new KBC chip.

#28 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a fifi88 • 16 Marec 2023, 16:54
I noticed that even when I program the KBC batch, it reads completely different than it programs.

#29 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a matic • 16 Marec 2023, 19:52
Try to do the following:
1) Read the BIOS chip dump with programmer.
2) Replace the embedded KBC chip firmware in the BIOS dump with the one you want to program the KBC with.
3) Reflash the BIOS chip with an edited dump.
4) Reflash the KBC chip with programmer.

#30 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a fifi88 • 23 Marec 2023, 13:03
matic napisal/-a:Try to do the following:
1) Read the BIOS chip dump with programmer.
2) Replace the embedded KBC chip firmware in the BIOS dump with the one you want to program the KBC with.
3) Reflash the BIOS chip with an edited dump.
4) Reflash the KBC chip with programmer.


Now is ok.

matic napisal/-a:Check that the measurements from post #9 are the same with the new KBC chip.


KBC pin :

12 - 1,79v
14 - 3,23v
18 - 0
21 - 0
72 - 1,4v
74 - 3,28V
76 - 3,25v
85 - 3,28v
89 - 0
90 - 0
93 - 3,28v
97 - 3,28
99 - 0
106 - 2,47
107 - 0
108 - 3,24v
109 - 3,26v
111 - 0
124 - 0
128 - 3,28V

Pin power button press
86 - 0
110 - 0

Pin power button release
86 - 3,25v after press is 0v
110 - 3,25V

#32 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a fifi88 • 24 Marec 2023, 10:26
Machine napisal/-a:Measure the voltage on pin 86 of kbc.
Measure the voltages on pin 110 of the KBC in the following cases:
at power off
with power on pressed
at power on.
o communication with the PCH.


Pin power button press
86 - 0
110 - 0

Pin power button release
86 - 3,25v after press is 0v
110 - 3,25V

#34 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a fifi88 • 24 Marec 2023, 19:30
Reflow UH1 not result.

I reflash BIOS and KBC another dump.

Machine napisal/-a:Measure the voltage on pin 86 of kbc.
Measure the voltages on pin 110 of the KBC in the following cases:
at power off
with power on pressed
at power on.
o communication with the PCH.


86 - 3,28V
110 power off - 3,25
110 power press- 0
110 power relese - 3,25

#35 Re: Lenovo IdeaPad L340-17IRH - nie uruchamia się

Napisal/-a matic • 24 Marec 2023, 21:03
Replace the PCH chip UH1.

 Ta tema je označena kot ARHIVSKA. Odgovorite samo, če vaše sporočilo vsebuje rešitev (Pravila in Pogoji, 12.1).
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