Thread: uboot ignores input
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Old 01-15-2022, 10:38 AM   #4
katadelos
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Posts: 219
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Join Date: Nov 2019
Location: United Kingdom
Device: K5, KT, KT2, KT3, KT4, KV, PW2, PW3, PW4, PW5
Quote:
Originally Posted by cwalls View Post
Is it likely that this (bad battery) is also the cause for the uboot problem (uboot prompt ignoring any input)?
Possibly, could also be a bad connection to the serial port too.

Quote:
Originally Posted by cwalls View Post
What is imx_epdc_fb? Maybe the line
Code:
imx_epdc_fb imx_epdc_fb: unable to set VCOM = 250mV (err = -22)
is caused by not having connected the e-ink display correctly?
That line is an error from the driver for the display (IMX E-Paper Display Controller FrameBuffer). Leaving the display disconnected will cause that error.


Quote:
Originally Posted by cwalls View Post
In the following image, is it correct that the chip/connector at the top left (J1603) is for the e-ink display, and the one at the top right (REV02 written on it) is for the touch sensor?
https://www.mobileread.com/forums/at...2&d=1415313934
That is correct.


Quote:
Originally Posted by cwalls View Post
In an attempt to remove the battery I used some force, which bend the battery a little. Can such bending cause such battery problems?
For sure, I'd replace it.
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