- Open the file with boardviewer.
- On the pins search field type these, and after selected from the list go to the "Net" tab on the right to see what points are connected on the board.
Then try to find a clear point that you can measure with multimeter in DC Voltage mode. Try not to touch other things around.
- RTC_RST#
- RSMRST#...
questore
Badcaps Veteran
Last Activity: Today, 06:49 AM
Joined: 12-15-2015
Location: Pest
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someone correct me if im wrong but I think this modell does not have an individual CMOS battery and 3V RTC is generated from the battery itself.
That is why it wont boot up without a battery present. Charging blink usually means there is a power rail problem somewhere.
Did it worked without battery before it died?...Leave a comment:
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You have a faulty PCH, or PCH have a crached solderball under it. You can try to inject 3.3v on the SLP_S4 and if laptop powers on then its just a cracked ball and you can bypass it with a wire, but if no then PCH have to be replaced....Leave a comment:
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Tryed your suggestion to read right the first time when pluggin charger and the reading progress bar was very slow but gone till the end, the full reading was empty "FF"
Either something was erased the EC and it cannot be reprogrammed anymore or it is dead.
Also tryed to write with the sam method but since it erases before write, it never got to writing since after erase it lost contact.
Also strange that whenever i got a EC ID that seems corrupt: 8CFF rev -> FF
I think it time to order a new EC...Last edited by questore; 05-07-2025, 07:32 AM.Leave a comment:
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Hmmm might be a good idea to not check the connection but to directly read the EC at first time.
Number 5 on the list is not an option in here since power button is in the keyboard and I'm using keyboard connector to flash but on other modells might be good idea thank you....Leave a comment:
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Thanks, in the end case I will try it....Leave a comment:
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Good idea but be carefull, if there is interference like it was at my case, some bits Will be changed when the interference kick ín durring write process....Leave a comment:
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When I had the same problem, then the problem was interference with the power outlet 230v. The pc I used was plugged ín to the same power outlet As the charger of the laptop I tryed tó reprogramm. That made the readings random.
Try using a surge protector or another outlet...Leave a comment:
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I just had a very strange matrix feeling.
A NM-D711 come to me with a very very similar problem. its EC only answers once when I plug it in and never more. it also has BIOS 3.3v on pin #8 even when it is not turned on.
If I order a new IC what are the chance that I will be able to programm it if its empty?Leave a comment:
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No change.
Still very stange that two original charger is saying EC ID is wrong when connecting and power supply with the same connector is answering at first correctly.
Of course i have checked the power voltage and the two chargers connector is good.
Also what I have noticed that when I plug any charger the BIOS pin 8 has 1.8V even when the laptop is off.
could this mean that the EC firmware is corrupted?...Last edited by questore; 05-04-2025, 10:59 AM.Leave a comment:
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Thanks you for the típus.
Im using clip, but verifilying always after write. Never has any problem with clips.
I Will try to wait 2 minutes after flash but since power consumpson stays exactly 0.620 I have stopper. Alsó tryed with onboard rám only but same...Leave a comment:
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Correct, but it acts differently, nevertheless EC cannot be read somehow....Leave a comment:
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NM-C511 not posting after BIOS update
Hi everyone,
Someone come to me after his lenovo has made a BIOS update and after never posting.
Board is:
NM-C511 rev 1.0
ideapad_s145-15api (Type 81UT)
S/N: PF1WZ2L8
After full removing AC and battery and cmos battery and pressing power button for 30sec the laptop turns on and every LED and power rail comes fine,
CPU is very mildly warming up but reaction to buttons and no display.
Tryed to reflash bios suggested on this forum but nothing changed.
Tryed to reprogram the EC with vertyanov programmer but the following happens.... -
No luck on this, nothing to do maybe a bad CPU because of original heatsink was not properly contacted and fied CPU...Leave a comment:
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Afterinfo.
5 long 3 short was back several times and looking closely at the board i found that on the back PUH1 was carbonized so 0.95v was randomly on and off making CPU line instable on start. Now trying to fix it and get back it the problem is resolved or not. Maybe others will learn from this.Leave a comment:
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No luck....Leave a comment:
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Hi Everyone.
Can someone verify my BIOS file? Laptop never posted after a BIOS update. Every power rail comes up but does nothing.
NM-C511 rev 1.0
ideapad_s145-15api (Type 81UT)
S/N: PF1WZ2L8...Last edited by questore; 05-01-2025, 09:37 AM.Leave a comment:
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Thanks That maches perfectly by datasheet.
Have a very nice day
...
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HP 250 G6 LA-E801P Please help identify IC.
Hello Everyone,
I have a laptop that has a faulty IC, the boardview and schematic cannot help to identify it.
Board has 3 identical IC on it named my boardview: PUG1, PUA1, PUZ2.
Shematics are not helpfull cause they give the ic as RT9610CGQW_WDFN8 and that is not correct. (pin 3 should be DRVON and it is not by datasheet)
its a 8 pin IC and has marking of "CGJ" on it.
Can you help me what it could be?...
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