Hi,
I liquid damaged a Macbook, disassembled it and spotted short near UP800. After desoldering it short was gone so I ordered the chip from https://aliexpress.com/item/1005005500396324.html.
Laptop is turning on, I can see something on the display if I flash strong light at it.
After replacing the chip, there is still no backlight. I measured components near the chip on both sides of the board again but everything seems fine.
Next I measured voltages near the chip, there is 5V, 1.2V, also 2.5V on LUXE_C_VDD (seems like it's internally generated by the chip, since only two components connected to that line are the chip and capacitor).
LUXE_FAULT line has 1.1V not sure if that means that fault was detected or not.
No voltage is being generated on LP800.
I noticed that the chip has debug I2C interface. Can something be learned if I would sniff this traffic?
Any Ideas what could I check next?
Thanks!
I liquid damaged a Macbook, disassembled it and spotted short near UP800. After desoldering it short was gone so I ordered the chip from https://aliexpress.com/item/1005005500396324.html.
Laptop is turning on, I can see something on the display if I flash strong light at it.
After replacing the chip, there is still no backlight. I measured components near the chip on both sides of the board again but everything seems fine.
Next I measured voltages near the chip, there is 5V, 1.2V, also 2.5V on LUXE_C_VDD (seems like it's internally generated by the chip, since only two components connected to that line are the chip and capacitor).
LUXE_FAULT line has 1.1V not sure if that means that fault was detected or not.
No voltage is being generated on LP800.
I noticed that the chip has debug I2C interface. Can something be learned if I would sniff this traffic?
Any Ideas what could I check next?
Thanks!