judamex
Active Member
Last Activity: Yesterday, 07:43 PM
Joined: 01-27-2021
Location: Mexico
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Thanks, work for me but i cant put a ST, need patch a 8mb file and all ok... -
Thanks resolve my problem, Black screen with New GPULeave a comment:
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I changed the charging center and connector 821-1722-A and the equipment works perfectly now...Leave a comment:
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Thanks, I'm a little confused, why does it turn on but no light comes on on the charger and I don't know what signals to check, I started with the charging IC but it seems to be fine....Leave a comment:
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MacBook Air 820-00165 turns on But no green and orange light, not charge
MacBook Air turns on without battery connected, no green or orange light comes on, I connect the battery and it shows battery with lightning and it restarts constantly. -
Work for me...Leave a comment:
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I ordered another battery from Amazon, put it in and it showed the same problem:
-battery LED blinks
-same voltages as I mentioned
the voltage on pin 4 of mosfet DC-in is =25V
voltage for high Mosfet on Bat+ =0.9V
-battery in windows shows 100% charge (obviously when disconnecting the charger it turns off by itself)
-the laptop turns on by itself
I should order a brand new BQ2400 from Aliexpress...Leave a comment:
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The strange thing is that the battery worked until it died, and that's when they decided to repair it because the charging LED no longer lit up. But I'll see if I can try another battery that I know works well....Leave a comment:
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I measured the mosfets from the outside, and they have normal values, there is no low resistance, nor short circuit.
The measurements between source and gate, remain low on the motherboard, for both mosfets...Leave a comment:
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[B]PQH8901
Source (Red) / Drain (Black) = 0.65 Mohm
Source(Black) / Drain (Red) = 0.7 Mohm
Source (Red) / Gate (Black) = 180Kohm
Source (Black) / Gate (Red) = 180Kohm
Gate (Red) / Drain (Black) = 700Mohm
Gate (Black) / Drain (Red) = 0.82Mohm[/B]
[B]PQL8901
Source (Red) / Drain (Black) = 0.600Mohm
Source(Black) / Drain (Red) = 0.700Mohm
Source (Red) / Gate (Black) = 8.3Kohm
Source (Black) / Gate (Red) = 113Kohm
Gate (Red) / Drain (Black) = 0.750Mohm
Gate (Black) / Drain (Red)...Leave a comment:
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the voltage on pin 4 of mosfet DC-in is =25V
voltage for high Mosfet on Bat+ =0.9V
I measured all the mosfets to check for short circuit and they are fine....Leave a comment:
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Yes, I am using the original adapter, and I am also injecting adequate voltage, with amperage similar to that of the original adapter.
The measurements are as follows:
[B]P_SMB0_CLK = 3.3V
P_SMB0_DAT = 3.3V[/B]Yes, I am using the original adapter, and I am also injecting adequate voltage, with amperage similar to that of the original adapter.
The measurements are as follows:
[B]P_SMB0_CLK = 3.3V
P_SMB0_DAT = 3.3V[/B]...Leave a comment:
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Asus ROG Zephyrus G14 GA401QM Won´t charge
Hello, I have an Asus ROG Zephyrus G14 GA401QM which had a short circuit in the BQ24800 and would not turn on. The BQ24800 was replaced and now it turns on with the charger, but does not charge the battery. I have schematics and boardview, I checked mosfets and basic signals, but everything seems to be fine. The output voltage to the battery does not exceed 1V -
OMG Your post works! Thanks!
i can change the SN thanks!...Leave a comment:
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Sorry
Thinkpad T14 gen 4
SN: PF-4PYXD7
TYPE: 21HE-S89500
following the next tutorial
[URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/3249948-lenovo-golden-key-v3-5-60-dmi-editor-bootable-usb[/URL]https://Sorry<br /> Thinkpad T14 gen...ops-tablets-an...Leave a comment:
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I tried with lenovo golden key 3.5 and I get the following errors
Thinkpad T14 gen 4
SN: PF-4PYXD7
TYPE: 21HE-S89500...Last edited by judamex; 01-06-2025, 06:24 PM.Leave a comment:
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With Lenovo golden usb?
Where can I get a valid serial number for this case?...Leave a comment:
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Some Help for this? T14 gen 4 no Bios pw, but i cant disable this...
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Update, replace the IC with a compatible one (3H) and the problem continues, I am checking the signals of that IC and it seems that it turns on and off the 3V.
The EN signal that comes from the KBC is also intermittent and 3VALV to,
Any signal that I should check?Leave a comment:
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Thanks...Leave a comment:
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