Thank you very much for your reply.
I will try the files tomorrow and post the result.
I can read the 128MB file, but it's not writing to it. I think it's a problem with the EEPROM.
I'm using the XGecu Pro T48 programmer....
Sergio Kub
Senior Member
Last Activity: Today, 12:56 PM
Joined: 07-10-2018
Location: Rio de Janeiro
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The white power light flashes as soon as I connect the battery charger.
I think it's a corrupted BIOS.
Lenovo Ideapad 1 15IAU7
SN: PE0DZDJW
Board NM-E331 Tev. 1.0
Can anyone get BIOS files?...Leave a comment:
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thanksLeave a comment:
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Thank...Leave a comment:
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820-02536 It doesn't turn on, it's stuck at 5V.
Has anyone ever removed the shielding from the 820-02536 board to access some components ?
I need to check the 5V (PP5V_CHGR_SW) and other points. -
Thank a lot...Leave a comment:
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Thanks u a lot...Leave a comment:
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thank u !Leave a comment:
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thank u...Leave a comment:
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I think that's the problem, but I still don't know how to activate the battery.Leave a comment:
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C BMU SYS_DETECT NOTES
The BMU SYS_DETECT circuit relies on the system assembly in order to be properly enabled.
During assembly, a metal gasket is placed between the cowling and the top-side of the BMU flex.
The gasket is used to connect the BMU_CWL_DET_L signal, located between J5150.1 and Q5190.2,
to GND. Once BMU_CWL_DET_L is tied to GND, then the SYS_DETECT circuit is ready to be enabled.
The BMU VBAT output will be enabled after the BMU flex and cowling are installed and power is
supplied by connecting a power adapter to either the USB-C or MagSafe Connectors....Leave a comment:
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I tested only with Q5230, without Q5240 and then swapped one with the other (they are the same). The Q5230 Gate is not activated by U5200. What signal would give the OK for the IC to activate the Q5230 input? It is not activating the MOSFET first because there may be something wrong ahead, like a short circuit.vLeave a comment:
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SSD já foi substituído 2 vezes....Leave a comment:
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There are two dual MOSFETs at the power input, Q5230 and Q5240.
The resistances measured were from the two MOSFETs in the first package. Q5230Leave a comment:
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Q5230 are 2 transistors in the same package. It's dual.
Should I remove the first one anyway?Leave a comment:
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Q5230 / 2
S - D 800K Ohm
S - G 700K Ohm
G - D 427K OhmLeave a comment:
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S - D 700 K Ohm
S - G 350 K Ohm
G -D 6.37 M Ohm...Leave a comment:
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It is a double transistor
First
Pin 3, 4 and 5 D - 5V
Pin 6 G - 0V
Pin 7 S - 0V
Consequently, the second transistor with all pins 0V,Leave a comment:
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Thanks for responding.
The fuse is not blown.
Without power to the board, the resistance measurement on the F5022 is high, around 1M Ohm.
The voltage does not pass through Q5230, right at the input.Leave a comment:
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Macbook Air A 2681 Board 820-02536 No turn on
Hello,
I have a Mac A2681 motherboard 820-02536. It was spilled in water. I had already cleaned it with isopropyl alcohol and managed to get it working. However, the keyboard, touchpad, and power button failed.
A month later, I replaced these components, and the motherboard no longer turns on.
F5200 resistance: 1 M Ohm
Stuck at 5V
Voltage doesn't pass the first transistor, Q5230
Can anyone help? I couldn't find the sequence.
I appreciate any tips or collaboration in advance....
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