小白求助：3288点不亮1lane的EDP屏

bbsnnn

上电开机uboot就提示hw lt err:4 ，link train failed! 请各位大神帮忙看看是什么原因引起的呢？谢谢


U-Boot 2014.10-RK3288-10-01889-g5bcca36-dirty (Apr 20 2016 - 19:59:27)

CPU: rk3288
CPU's clock information:
    arm pll = 600000000HZ
    periph pll = 297000000HZ
    ddr pll = 200000000HZ
    codec pll = 384000000HZ
Board:  Rockchip platform Board
DRAM:  Found dram banks:1
Adding bank:0000000000000000(0000000080000000)
128 MiB
storage init OK!
Using default environment

GetParam
check parameter success
failed to prepare fdt from boot!
power key: bank-0 pin-5
can't find dts node for ricoh619
pmic:act8846
SecureBootEn = 0, SecureBootLock = 0

#Boot ver: 2016-04-20#2.19
empty serial no.
checkKey
vbus = 1
no fuel gauge found
no fuel gauge found
read logo on state from dts [1]
pll_src = 1, dclk_hz = 148500000, dclk_div = 2
edp pll locked
hw lt err:4
link train failed!
unable to config video
failed to find part:logo
Error: no valid bmp image at 5bf0000, sign:ÿ Ø
no fuel gauge found
rk_pwm_config:brightness:200
Hit any key to stop autoboot:  0
load fdt from resouce.
Secure Boot state: 0
kernel   @ 0x02000000 (0x006a5ec0)
ramdisk  @ 0x05bf0000 (0x00138ef8)
bootrk: do_bootm_linux...
   Loading Device Tree to 05600000, end 0563c035 ... OK
Add bank:0000000000000000, 0000000080000000