Here I am,
I finally got the serial converter and read the boot log from the console ...
The log is attached but here is the evidence:
#########
U-Boot 2009.08-00784-ge26a520-dirty-svn2940 ( 1æ 13 2015 - 14:27:41)
CPU: Freescale i.MX6 family TO0.0 at 792 MHz
Temperature: 29 C, calibration data 0x57c5015f
...(omitted)...
Starting kernel ...
drivers/misc/ntx-misc.c(msp430_i2c_probe): Can't allocate irq 395
[zForce_ir_touch_recv_data-259] command BootComplete (0)...
PMU: ricoh61x_battery_probe : version is RICOH61x_BATTERY_VERSION: 2014.02.21 V3.1.0.0-Solution1 2015/02/09
drivers/video/mxc/lk_tps65185.c(568):tps65185_int_func under-voltage on VEE charge pump detected !
#######
The last message is repeated continuously intervalled by a line like:
drivers/video/mxc/lk_tps65185.c(1380):wait power on timeout lpcnt=0!
in which lpcnt counts up each 36 messages til
cannot open /dev/nulldrivers/video/mxc/lk_tps65185.c(568):tps65185_int_func under-voltage on VEE charge pump detected !
then we got
dosfsck 3.0.6, 04 Oct 2009, FAT32drivers/video/mxc/lk_tps65185.c(568):tps65185_int_func under-voltage on VEE charge pump detected !
, LFN
There are differences between boodrivers/video/mxc/lk_tps65185.c(568):tps65185_int_func under-voltage on VEE charge pump detected !
t sector and its backup.
Differences: (offset: original/backup)
drivers/video/mxc/lk_tps65185.c(568):tps65185_int_func under-voltage on VEE charge pump detected !
489:8d/00, 490:ef/00, 491:02/00, 492:d2/00, 494:ff/00, 495:ff/0drivers/video/mxc/lk_tps65185.c(568):tps65185_int_func under-voltage on VEE charge pump detected !
0, 496:ff/00
, 497:ff/00, 498:ff/00, 499:ff/00, 500:ff/00, 501drivers/video/mxc/lk_tps65185.c(568):tps65185_int_func under-voltage on VEE charge pump detected !
:ff/00, 502:ff/00
, 503:ff/00, 504:ff/00, 505:ff/00, 506:ff/00drivers/video/mxc/lk_tps65185.c(568):tps65185_int_func under-voltage on VEE charge pump detected !
, 507:ff/00, 508:ff/00
, 509:ff/00
Not automatically fixingdrivers/video/mxc/lk_tps65185.c(568):tps65185_int_func under-voltage on VEE charge pump detected !
this.
So it clearly shows up an hardware error.
It seems a problem on the negative voltage (VEE) converter in the e-paper display power supply IC (TPS65185) not reaching the right level (-20V).
