求助！TCL-L42A71C (AM6C机芯) 智能液晶电视不启动故障

张大为

TCL-L42A71C (AM6C机芯) 智能液晶电视
插电后待机正常，但按下遥控器或机身开关后，指示灯亮，随后背光亮，但屏幕黑屏没有任何显示，约40秒后指示灯和背光熄灭。再次下遥控器或机身开关后，重复上述过程。

拆机查电源板各电压输出正常，主板各关键点电压正常。

向高手们请教一下：接下来该怎样查？这种现象最有可能的故障点是哪里，该怎样处理？

谢谢！！

统一中华

如果开机背光亮了，屏无显示，为什么屏无显示，我想接下来该换人修了

张大为

信息打印出来了 ，请高手帮看下！
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 I3000000032940xf100110303;77500EEEE I400000004294_M6_BL1_1483<253?333

SR0: 0x80000fff
PGSR1: 0x00000000

DDR clock is 672MHz with 2T mode

Stage 00 Result 00000000
Stage 01 Result 00000000
Stage 02 Result 00000000
Stage 03 Result 00000000
Aml log : AO_RTI_STATUS_REG0 = 0x6b730001

HHH
cache enable
Boot From SDIO C
0x000000c7
ucl decompress
decompress true
0x12345678
Boot from internal device 1st SDIO C

System Started

spl boot time(us):0x00028bb2


L(m6tv_h32_v1@next) (Aug 08 2014 - 16:23:08)

Clear HDMI KSV RAM
DRAM:  1 GiB
relocation Offset is: 1061c000
logo led on

from sys start to board_init_r time(-us):1623535
aml_i2c_init
IR init done!
register usb cfg[0][1] = 9fe89cd8
register usb cfg[0][2] = 9fe89cf0
register usb cfg[0][3] = 9fe89d08
register usb cfg[0][4] = 9fe89d20
register usb cfg[2][0] = 9fe8c0cc
setup_external_phy
setup_internal_phy
logo led on
MMC:   SDIO Port B: 0, SDIO Port C: 1
*** Warning - readenv() failed, using default environment

logo led on
logo led on
LCD Initialize:   
project id = 0x18
===== panel_index = 14
###### panel_index = 14
lcd type max 4
_lcd_module_enable---.
lvds cur index = 1
pll_sel=0, pll_div_sel=1, vclk_sel=0, pll_reg=0x40050c82, div_reg=0x10803, xd=1.
LCD:    1920x1080 32bbp
logo led on

from board_init_r to start main_loop time(us):347514

logo led on
init suspend firmware done. (ret:0)
uboot version:Version:2.1.0.cea4633d
uboot git version:cea4633d0c5cae9f3852c0704ddafe574f96e223
uboot version serial:2010000cea4633d
uboot git branch:* next-mxtv0921-h32ref
uboot Last Changedate:   Fri Aug 8 16:20:04 2014 +0800
uboot Last Build:Fri Aug  8 16:23:08 CST 2014
uboot Builer Name:wenhua.song

pao_reg0 = 6b730001 ,pao_reg1 = 1 pao_reg2=1234abcd
----bootargs equal---------
switch_boot_mode
reboot_mode_current = 0x1
suspend flag = off

MMC read: dev # 1, block # 10240, count 512 ... 0 blocks read: ERROR
emmc save env fail
efuse version is not selected.
Hit any key to stop autoboot:  0
Device: SDIO Port C
Manufacturer ID: 0
OEM: 0
Name: 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 fail

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 fail

MMC read: dev # 1, block # 49152, count 16384 ... 0 blocks read: ERROR
power on to now time: 0x4dfb76
Wrong Image Format for bootm command
ERROR: can't get kernel image!
m6tv_h32_v1#EEEE I3000000032940xf100110303;77500EEEE I400000004294_M6_BL1_1483<253?333EEEE I6000000062940 stage is skipped63936475EEEE I3000000032940xff00dead16<22030EEEE I600000006294NO boot up device found1286?1:2EEEE I500000005294enter serial boot13549030

SR0: 0x80000fff
PGSR1: 0x00000000

DDR clock is 672MHz with 2T mode

Stage 00 Result 00000000
Stage 01 Result 00000000
Stage 02 Result 00000000
Stage 03 Result 00000000
Aml log : AO_RTI_STATUS_REG0 = 0x6b730001

HHH
cache enable
Boot From SDIO C
0x000000c7
ucl decompress
decompress true
0x12345678
Boot from internal device 1st SDIO C

System Started

spl boot time(us):0x0002879f


L(m6tv_h32_v1@next) (Aug 08 2014 - 16:23:08)

Clear HDMI KSV RAM
DRAM:  1 GiB
relocation Offset is: 1061c000
logo led on

from sys start to board_init_r time(-us):13181206
aml_i2c_init
IR init done!
register usb cfg[0][1] = 9fe89cd8
register usb cfg[0][2] = 9fe89cf0
register usb cfg[0][3] = 9fe89d08
register usb cfg[0][4] = 9fe89d20
register usb cfg[2][0] = 9fe8c0cc
setup_external_phy
setup_internal_phy
logo led on
MMC:   SDIO Port B: 0, SDIO Port C: 1
*** Warning - readenv() failed, using default environment

logo led on
logo led on
LCD Initialize:   
project id = 0x18
===== panel_index = 14
###### panel_index = 14
lcd type max 4
_lcd_module_enable---.
lvds cur index = 1
pll_sel=0, pll_div_sel=1, vclk_sel=0, pll_reg=0x40050c82, div_reg=0x10803, xd=1.
LCD:    1920x1080 32bbp
logo led on

from board_init_r to start main_loop time(us):347595

logo led on
init suspend firmware done. (ret:0)
uboot version:Version:2.1.0.cea4633d
uboot git version:cea4633d0c5cae9f3852c0704ddafe574f96e223
uboot version serial:2010000cea4633d
uboot git branch:* next-mxtv0921-h32ref
uboot Last Changedate:   Fri Aug 8 16:20:04 2014 +0800
uboot Last Build:Fri Aug  8 16:23:08 CST 2014
uboot Builer Name:wenhua.song

pao_reg0 = 6b730001 ,pao_reg1 = 1 pao_reg2=0
----bootargs equal---------
switch_boot_mode
reboot_mode_current = 0x1
suspend flag = off

MMC read: dev # 1, block # 10240, count 512 ... 0 blocks read: ERROR
current vcck is 0x0!
enter meson_pm_suspend!
a pull up led rw
target ddr clock 0x80020838!
ADC busy error.
0:0xffffffff
--PERIPHS_PIN_MUX_0 = 0
--PERIPHS_PIN_MUX_1 = 0
--PERIPHS_PIN_MUX_2 = fc00
--PERIPHS_PIN_MUX_3 = 0
--PERIPHS_PIN_MUX_4 = 0
--PERIPHS_PIN_MUX_5 = c0000000
--PERIPHS_PIN_MUX_6 = 3f000000
--PERIPHS_PIN_MUX_7 = 0
--PERIPHS_PIN_MUX_8 = 0
--PERIPHS_PIN_MUX_9 = 0
--PAD_PULL_UP_REG0 = 0
--PAD_PULL_UP_REG1 = 0
--PAD_PULL_UP_REG2 = 0
--PAD_PULL_UP_REG3 = 0
--PAD_PULL_UP_REG4 = 0
--PAD_PULL_UP_REG5 = c000000
--PAD_PULL_UP_REG6 = 0
PERIPHS_PIN_MUX_0 ffffffff
PERIPHS_PIN_MUX_1 ffffffff
PERIPHS_PIN_MUX_2 ffffffff
PERIPHS_PIN_MUX_3 ffffffff
PERIPHS_PIN_MUX_4 ffffffff
PERIPHS_PIN_MUX_5 ffffffff
PERIPHS_PIN_MUX_6 ffffffff
PERIPHS_PIN_MUX_7 ffffffff
PERIPHS_PIN_MUX_8 ffffffff
PERIPHS_PIN_MUX_9 ffffffff
PAD_PULL_UP_REG0 ffffffff
PAD_PULL_UP_REG1 0
PAD_PULL_UP_REG2 ffffffff
PAD_PULL_UP_REG3 ffffffff
PAD_PULL_UP_REG4 ffffffff
PAD_PULL_UP_REG5 f7ffffff
PAD_PULL_UP_REG6 ffffffff
LCDGPIOA 3fffffff
LCDGPIOB ffffff
GPIOX0_12 1fff
BOOT0_17 3ffff
GPIOZ0_19 fffff
GPIOY0_27 f7fffff
GPIOW0_19 fffff
CRAD0_8 ff000000
GPIOP6 0
0---GPIOX2 -- BL_EN input 1
1---GPIOZ5 -- PANEL_PWR input 1
m6tvref_set_pinmux() Power OFF
a
Pclk HHI_MPEG_CLK_CNTL(c1104174) off
c
ADC busy error.
2:0xffffffff
pll HHI_VIID_PLL_CNTL(c110411c) off
sleep ...
initial appf
uboot enter!
late_init ...
power down cpu --
uboot enter!
cluster:9ff04100
cpu:00000000
cluster_index:00000000
step1
step2
save step 1
save step 2
save step 3
save step 4
save step 5
save step 6
save step 7
save step 8
save step 9
save step 10
step3
run_arc_program ...
sleep .......
step 1: DDR enter self-refresh
hx_save_ddr_settings
hx_enter_power_down
hx_disable_mmc_req
hx_store_restore_plls
Start DDR off
hx_mmc_sleep
hx_enable_retention
mmc soft rst
Only PUB/PCTL soft reset! --> Please check!
Done DDR off
step 2: CPU off
step 3: store pll
step 4: power off domain
power down core.

13997666139

RBYRTN RUNME6UT676

zhangcanhai

emmc save env fail

zhangcanhai

检查EMMC供电是否正常，如果正常，重写引导再升主程序。