Hello,
I'm seeking assistance with schematics, board view, or help with identifying the component in the picture. Even if this component is replaced, I have a suspicion that something else might be at play. Therefore, a board view would be greatly appreciated....
Ado02
Senior Member
Last Activity: 03-08-2024, 12:13 PM
Joined: 07-14-2021
Location: Manchester
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Samsung NP930XDB schematics or part identification
Last edited by SMDFlea; 11-14-2023, 03:55 PM. -
Re: Asus X512F No Power
ANC: 3.18v
ACP: 3.18v
CMSRC: 3.18v
ACOK: 6V
ACDET: 2.62v
REGN: 6v
VCC: 19.8v -
Asus X512F No Power
Hi,
I'm working on an Asus X512F laptop that wouldn't turn on initially. It did power up when I disconnected the keyboard, but it shut down soon after.
I think the problem might be around the keyboard connector area, where the battery connector and Charging IC (BQ24780s) are also located.
When the laptop doesn't charge or power on, the battery positive measures only 0.22v. When it does charge, it reads 6v. The ACDRV on the charging IC shows 3.15v, but it should be around 25v.
Any ideas on what else I should check, or if I'm on the right... -
Asus X515JA Bios Request
Hi,
Can someone help me with the bios for the Asus X515JA?
An image of the complete model and serial number is attached alongside the bios dump.
Problem: Laptop power light on / battery light blinking white / no other signs of life....Leave a comment:
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Re: Nitro 5 Motherboard: LA-F991P LCD Backlight Problem
Can anyone help with this?Leave a comment:
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Acer Chromebook CB514-1H / da0zahmb6c0
Hi,
I am looking for board view and schematics for Acer Chromebook CB514-1H / da0zahmb6c0 - can anyone help? -
Nitro 5 Motherboard: LA-F991P LCD Backlight Problem
Hi,
I am currently working on a Nitro 5 laptop that came in with an issue involving the hinge and the LCD cable. The LCD cable has been replaced, and so has the screen. However, I am encountering a problem with getting the backlight to work.
While I am not an expert in this area, I suspect that PCH_BLK_PWM and BKOFF may be related to the backlight circuit. However, both of these components lead to integrated circuits (ICs), which makes it challenging for me to perform any checks.
Does anyone have any suggestions on where I should begin troubleshooting?...Last edited by SMDFlea; 10-09-2023, 06:02 AM. -
Re: Need LenovoLegion 5-15IMH05H NM-c911 bios Clean dump
Hi,
Thank you for being so helpful. Unfortunately, the problem is still there. I compared your BIOS file and the backup BIOS, and they are very different. If the original BIOS was corrupted, this would make sense. But why is the problem still happening? Am I missing something, or could it be a hardware issue?
If the screen is the problem would I still be able to get an HDMI output on this model without the laptop booting into Windows?...Leave a comment:
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Re: Need LenovoLegion 5-15IMH05H NM-c911 bios Clean dump
Can anyone help?Leave a comment:
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Re: Need LenovoLegion 5-15IMH05H NM-c911 bios Clean dump
Sorry, the original attachment failed. I just noticed it. It's now added....Leave a comment:
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Re: Need LenovoLegion 5-15IMH05H NM-c911 bios Clean dump
Hi, will this bios work instead of the attached bios? I believe the version is EFCN59WW.
I have already tried it, but the screen remains black. So, I just wanted to confirm that is should work. If not can someone help me with the correct bios?
SN: PF1ANGW6...Last edited by Ado02; 09-30-2023, 02:07 AM.Leave a comment:
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ZB08P03 Alternative?
Hi,
I am trying to source the ZB08P03 mosfet but can't find one in the UK. Can anyone suggest an alternative? -
Re: Acer SF314-41 battery not detected
SOLVED:
Ordered another brand-new battery and this time everything works as it should.Leave a comment:
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Re: Lenovo ThinkPad E14 Gen 2 / GE4B0 / Not Charging
Solved:
Replaced QB6 AON7466 - found the same mosfet on another Lenovo motherboard and the charging is restored.
Thank you for your help...Leave a comment:
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Re: Lenovo ThinkPad E14 Gen 2 / GE4B0 / Not Charging
QB6
1-2-3 & 5-6-7-8 / 3.67 Mohms
1-2-4 & 4 / 4.00 Mohms
4 & 5-6-7-8 / At this point I noticed that the MOSFET started to lift away from the motherboard. So, I can only think it's shorted, and the solder has given way.
It's an E120GN Mosfet - I have a few other Lenovo motherboards around like 17812-1 - but I can't seem to find the same one. Any suggestions?Leave a comment:
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Re: Acer SF314-41 battery not detected
PU4408
1-2-3 & 5-6-7-8 / 4.7 Mohms
1-2-4 & 4 / 3.78 Mohms
4 & 5-6-7-8 / 6.10 Mohms
PU4401
1-2-3 & 5-6-7-8 / 4.9 Mohms
1-2-4 & 4 / 3.78 Mohms
4 & 5-6-7-8 /5.72 MohmsLeave a comment:
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Re: Lenovo ThinkPad E14 Gen 2 / GE4B0 / Not Charging
I am unsure if I am doing something wrong, but the values consistently move on the faulty and working motherboard. But they always seem to be in the 1.200 Milliohms region but never stop moving.Leave a comment:
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Re: Lenovo ThinkPad E14 Gen 2 / GE4B0 / Not Charging
Both sides go from 1.4v to 2.5vLeave a comment:
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Re: Lenovo ThinkPad E14 Gen 2 / GE4B0 / Not Charging
I think the VINT20_IN is missing.
F6101 1.5V is going up and down a little. If I am correct this should be 20VLeave a comment:
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Re: Lenovo ThinkPad E14 Gen 2 / GE4B0 / Not Charging
Faulty Motherboard
PQ4 2 to 4 - 1.50v
PL4 - 0v
Working Motherboard:
PQ4 2 to 4 - 9.24v
PL4 - 9.28v...Leave a comment:
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