AppleLover123
Mr.Bombastic
Last Activity: 02-11-2026, 09:41 AM
Joined: 12-28-2023
Location: Gießen
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Here are the two Videos of the Board Looping. I dont know if the current draw for the 1.05v is normal. I tested this 10 Minutes ago and it even got over one amp!... -
No, it doesnt even Boot.
It's just the Power light coming on for 5 seconds.
The Board does not repond to any keys in this state. Even the keyboard light doesnt light up while it's on.
As I intended it could be the chipset.
I have an oscilloscope but I don't know the important Signals of the chipset to proof that it is faulty.
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Acer Nitro 5 comes on then goes off
Hey guys,
i've got this laptop from a friend who gave it to me in a dead state.
The laptop wasn't working at all so i've began my search on the 19V power rail.
It was shorted to ground so i injected voltage and the only thing getting hot was my ground clip from my power supply.
I found that the +1.05V Rail for the Chipset was shorted. i removed the coil and it was shorted on the power delivery side.
The pch seems fine bc the rail has over 50 ohms after i removed the coil.
Still nothing was getting hot so i suggested the chip must... -
Here are Pictures from These Chips hopefully can someone say what they are...
The Part number of the second Chip is Apw 8738A....Leave a comment:
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Hello,
found two components that are faulty on this mobo. But I don't have a schematic because i have to order the components. Can someone say what they are / what their Name of Model are.
The components are Marke in the pictures
One is a Chip and the other one seems to be a Regulator.
Thanks
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I programmed and replaced the ec chip with another one but the exact same Thing happens.
It still wont react to the Power Button and it keeps trying to start and goes after Plug ging ac to 921 milliamps (current still changung) than to 910 freezes and goes down to 861 mamps and stays there. It only goes up when the Fan is spinning.
Now this thing is quite a challenge because i never did those measurements but should i list an Signal of the ec Chip or pwm Chip? And when yes which Signals? Do i need an oscilloscop?
<--------------->...Leave a comment:
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No, i don't have a ram slot tester but I can use a Oscilloscope from a friend.
Never did those measurements tough but I think i came to the conclusion that this Laptop may has a corrupt ec Firmware because of the fact that when the bios Chip is removed and i plug the charger it does exactly the same as with the bios chip and it doesn't read the power button.
I Ordered the Svod 4 with the zif sockets and it will arrive in about one week......Leave a comment:
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No one???Leave a comment:
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Hey guys,
i did make a few Threads now but I wanted to make it clear.
I need a new BIOS Image for this Laptop:
Lenovo V155-15API
Model Name:81V5
Serial Nr: PF2125LC
MTM: 81V50004GE
Factory ID: JVHFC1
MO: PF9XB9B23174
Motherboard Model: FG542 FG543 FG742 NM-C101
Rev: 1.0
2019 - 05 - 07
Ryzen 3 3200U Model
I moved the resistors on the right Place.
The Laptop had faulty onboard ram modules and i tried disableing the ram with SPD removal tool 1.6 and RAM patcher from this forum.
As it didnt...Leave a comment:
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Hello,
tried the bios works perfectly.
You are correct it worked only on locked bios before maybe the System detects that the entries have changed on some important offsets or else.
Strange...
But thanks it works again!
How do you build a new BIOS?
Like is there a programm for it or what?Leave a comment:
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I forgot to mentioned that i've got this MB:
Cyborg L 15 TG L New Load SW MB 213277-1...Leave a comment:
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Had tried it now.
Laptop fans run from low to high then shutting off and restarting.
Sometimes it is giving backlight for 5 seconds and shuts off or showing me red,white,black,green screen and shuts off.
Any Idea?...Leave a comment:
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SMDFlea does the ram patcher also removes the entrys for the dimm slot in some cases?...Leave a comment:
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But what did i do wrong?!
I moved the resistors on place, diabled it in bios via ram patcher and desoldered the ram (thought it wouldnt recognize it anymore).
Do i have to move another resistor?...Leave a comment:
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Tried it and flashed the bios file... Now the current draw is 900-800milliamps again but still no picture.
I forgot to mention that ive got the Ryzen 3 3200u model. Maybe its a difference between the ryzen 5 and 3.
I found new Symptoms like it wont start or shut down when i press the power button.
It only powers on when i plug the charger.
It charges fine with about 900milliamps and runs over the battery when powered and charger disconected.
After a while the current draw goes down to 600 milliamps.
Voltage on ram module is present.
Nice...Leave a comment:
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(Repost)
Hello guys,
i have this laptop here that wont display.
First thing i did was checking voltages and all are Present.
After that i tried another ram sticks but they didnt change anything as well.
Then i tried programming the bios with two different bios files but nothing changed (i used the ch341a without the 1.8v Adapter but I was able to read/write the chip).
Now i thought it could be a ram issue.
I flashed a bios with onboard ram disabled (dump attached) and i moved the resistors on the right Place like it's Show in...Leave a comment:
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Lenovo V155 15-API no display
Hello guys,
i have this laptop here that wont display.
First thing i did was checking voltages and all are Present.
After that i tried another ram sticks but they didnt change anything as well.
Then i tried programming the bios with two different bios files but nothing changed (i used the ch341a without the 1.8v Adapter but I was able to read/write the chip).
Now i thought it could be a ram issue.
I flashed a bios with onboard ram disabled (dump attached) and i moved the resistors on the right Place like it's Show in the picture (attached).... -
I found a good bios on a discord server but nothing changes when i try it.
What i didn't mention is that the current at some point isnt changing anymore when i let it run for 2-3 mins.
That makes me think maybe the onboard ram is faulty... Is there any way to disable it thenclike removing resistors?...Leave a comment:
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Lenovo V155-15API
Model Name:81V5
Serial Nr: PF2125LC
MTM: 81V50004GE
Factory ID: JVHFC1
MO: PF9XB9B23174
Motherboard Model: FG542 FG543 FG742 NM-C101
Rev: 1.0
2019 - 05 - 07...Leave a comment:
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I destroyed my bios Chip.
Ordered a new one it will arrive tomorrow then i can test....Leave a comment:
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