REpairAT
Senior Member
Last Activity: Yesterday, 11:39 AM
Joined: 11-26-2020
Location: Vienna
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Thanks, interesting would be where exactly the gates get powered from. In my case, also the pads burnt off from the board and my solution right now looks like this. It turns on now, but my USB Meter now shows 19,8V And gate Voltage on both FETs is 21V, VGS measures exactly these 1,2V which is still too low and causes them to heat up quickly....
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Lenovo IdeaPad 5 Pro 16IHU6 NB3036_MB_V4_PCB
Hi,
has anyone schematics and boarview for this? Both USB-C power input Mosfets are blown due to low gate voltage and some components on the back side desoldered themselves from heat.
Thanks in advance & BR! -
Hi, any solution? Got the exact same issue. There's absolutely no measurable short on the board, no powerline, no mosfet, no cap, nothing.
Owner told, he wasn't able to turn it off anymore. As soon as he took out the battery, it never turned on again, if this is some hint.
Injecting 3.3V into VREG3 takes 1mA what looks good, but injecting 5V into VREG5 shows 25mA what looks high to me, for a machine that's turned off.
Any ideas?
Thanks a lot!
PS my board is Haymitch 4G MB 17889-1 448.0EJ11.0011 what seems to be the same, just 4GB VRAM.Leave a comment:
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Hi,
does anyone have the boardview as well?
Thanks a lot!Leave a comment:
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Hi,
got a W540 in which crashed during an update, only beeps. I wasted the last hours, trying to fix it by myself (There's even a good tutorial on YT) but failed, symptoms are still the same. Attached are the dumps of both chips, model is Lenovo W540 Type 20BH-S0WP00 SN.# R9-00KVWX.
I would be grateful, if someone more experienced could have a look on this.
Thanks a lot in advance!...Leave a comment:
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Confirmed working, thank you a lot & Have a nice weekend!
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Leave a comment:
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Tongfang GM7RG7N BIOS Admin Password
Hi,
got this Laptop here with a BIOS Admin passord set, only user (read-only) password is known.
I tried this AMIdecryptors already, no luck. When flashing a new BIOS BIN I got from the distributor, display remains black, possibly EC mismatch but I can not find it's BIN.
Dump attached. Maybe someone could help me removing the password?
Thanks a lot!... -
Hi,
also got a ProBook 450 G4 DA0X83MB6H0 REV:H with discrete graphics and a bricked BIOS. I was unable to fix the BIOS myself. May anyone help me out with this? Original dump attached. Thanks a lot!...Leave a comment:
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Re: Acer Aspire E5-575 Bios
tried to clean it by myself and also flashed this one now, sadly no success......Leave a comment:
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Re: Acer Aspire E5-575 Bios
S/N: NXGE6EV006638135F27600
SNID: 63807934676
Thanks!Leave a comment:
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Acer Aspire E5-575-565G BIOS
Hi,
I can't see myself out with this model. Issue is a black screen, I tried to flash 4 different BIOS BINs already. Obviously this model was sold with many different specification, original ACER BIOS also contains four different versions.
The one I need is:
[I]Acer Aspire E5-575-565G
Model No. N16Q2
MB: DAZAAMB16E0 REV:E
CPU: Intel Core i5-6267U
VGA: Intel Iris Graphics 550[/I]
Original dump attached.
Thanks a lot!Acer Aspire E5-575-565G BIOS
Hi,...Leave a comment:
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Re: YOGA 910 NM-A901 Schematic Request
Hi,
I'm also looking for schematics of the left IO board, NS-A901 because two USB-C solder pads are ripped off.
Thanks in advance!...Leave a comment:
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Re: Dell Inspiron 5737 - bios unlock/
Thanks man! That was the info I was looking for a while - worked perfectly on Vostro 3560....Leave a comment:
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Re: Medion Akoya S4402 EM_KR518_V2.0 BIOS
Seems to work, thanks a lot!...Leave a comment:
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Medion Akoya S4402 EM_KR518_V2.0 BIOS
Hi,
I'm unable to find a BIOS for this device. Maybe someone could fix my backup, as attached.
Model Medion [B]Akoya S4402 (S440x)[/B]
Mainboard [B]EM_KR518_V2.0[/B]
Thanks in advance!
BR,
RayHi,
I'm unable to find a BIOS for this device. Maybe someone could fix my backup, as attached.
Model Medion [B]Akoya S4402 (S440x)[/B]
Mainboard [B]EM_KR518_V2.0[/B]
Thanks in advance!
BR,
RayHi,
I'm unable to find a BIOS for this device. Maybe someone could fix my backup, as attached.... -
Re: HP EliteBook 840 G1 6050A2560201-MB-A03
Thanks, but no success
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Leave a comment:
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HP EliteBook 840 G1 6050A2560201-MB-A03
Hi,
could someone fix my BIOS? Already tried to clean ME on my own, no success.
Laptop does not turn on at all, only front LED blinks when plugged in and charging. When I solder both chips from a scrap 840G1 board, it turns on at least but blank sceen and fan on fullspeed, so I assume my original BIOS is corrupt.
Attached is the 16MB, should I dump the 2MB chip also?
Thanks!...Leave a comment:
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Re: HP EliteBook 840 G1 6050A2560201-MB-A03 Not turning on
Just checked Pin 72 on SIO controller, which is responsible for ON/OFF button, measures 3.3V and goes down to zero when button is pushed, so issue must be somewhere else, probably BIOS. I will check this next tomorrow, as it's this weird 2-chip layout.Leave a comment:
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Re: HP EliteBook 840 G1 6050A2560201-MB-A03 Not turning on
Measure taken from button itself on SUB board.
Towards ground, 4.7MOhm, goes to zero if button is pressed.
Edit: Measurment is the same, if SUB Board (Power Button, LED, Lid Sensor) is disconnected....Leave a comment:
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HP EliteBook 840 G1 6050A2560201-MB-A03 Not turning on
Hi,
the problem: As soon as charger gets connected, Power LED lights up for a second, battery is charging normally, just does not turn on.
Voltage on power button is 2.3V, which looks too low for me. Lid sensor, SIO, BIOS chip etc. all get full 3.3V. Got the schematic already, but without boardview I'm stuck.
Any ideas? Thanks!
BR, Ray
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