求助TCL42A71C 不开机 背光亮一会就灭 有打印息

新兴科技

   TCL42A71C 不开机   背光亮一会就灭  有打印息  求师傅们给看一下  是哪出了问题。2020-5-9, 14:4:42 COM8, BaudRate:115200 bps, RXD: VGA->11,TXD: VGA-> 4, Printed by RT809H:

power up core.
write flags again for pad gpio wake up--
step 7: restore pll
c000067d
sys pll store done.
mpll store done.
vid pll store done.
step 8: resume ddr
step 8
hx_reset_mmc
NOT DO MMC reset! --> Please check!
step 9
hx_disable_retention


PGSR0: 0x80000fff
PGSR1: 0x00000000
step 10
leave_power_down
restart arm
EEEE I3000000032940xf1001103?

PGSR0: 0x80000fffManufacturer ID: 0
OEM: 0
Name: 怲ran Speed: 50000000
Rd Block Len: 512
MMC version 4.0
High Capacity: Yes
Capacity: 3909091328
Boot Part Size: 4194304
Bus Width: 4-bit
emmc save env ok


MMC read: dev # 1, block # 16384, count 2048 ... 0 blocks read: ERROR
Video initializing...
osd_layer_init
frame buffer address is 0x84100000
video size is 1920 X 1080
video bbp is 32
pwm reg ---> 0x4130120
emmc save env ok


MMC read: dev # 1, block # 49152, count 16384 ... 0 blocks read: ERROR
power on to now time: 0xdbf84e
Wrong Image Format for bootm command
ERROR: can't get kernel image!
m6tv_h32_v1#EEEE I3000000032940xf1001103EEEE I3000000032940xff00dead这是打印信息开头和结尾的信息 不知能不能看出问题？

莫乾坤

你百度就可以看出来

家电医生、阳光保险贾红民

先检查一下背光在下结论

新兴科技

家电医生、阳光保险贾红民 2020-5-9 20:46
先检查一下背光在下结论

谢谢   背光没问题 亮时是灰屏 灭时是背光启电压消失。

家电医生、阳光保险贾红民

屏上供电正常吗，可断开一边屏线试一下。

家电医生、阳光保险贾红民

修理工需细心，总接经验。