创维 42E61HR 8M50 不开机

孤狼

创维 42E61HR 8M50 不开机

检查PCB板是否存在缺件或元件脱落，经仔细检查，发现L117已经脱落，补齐L117，侧得5V电压、开机信号、12V、24V电压输出均正常。测量主芯片的3.3V供电正常，内核供电1.15V正常。尝试烧写引导程序，没有解决问题，插上升级U盘升级主程序，U盘指示灯不闪烁，标明主板没有读取程序，更换新的NAND FLASH,并进行升级，升级成功，电视正常开机

涟水河

楼主可不可以提供下这机子的升级程序，我有台这机子不开机，打印信息如下，多半程序问题，麻烦了
UART_115200

BIST0-OK
[456789]
[6789]-67
_U
Hello U-Boot


U-Boot 1.1.6 (Dec 30 2011 - 14:35:48)

Board: MSTAR AMBER7 (CPU Speed 504 MHz)
DRAM:  256 MBytes
U-Boot is running at DRAM 0x87600000
Module: KEYPAD USB FAT NAND UBI UBIFS NET SPI STANDBY JFFS2 LOGO OAD ENV=SERIAL

Flash is detected (0x0507, 0xC2, 0x20, 0x15)
MDrv_SERFLASH_GetInfo()
        u32AccessWidth = 1
        u32TotalSize   = 2097152
        u32SecNum      = 32
        u32SecSize     = 65536
>>> nand: AUTO CE/WP

Flash Make code = 0xEC, ID = 0xF1

Flash Make code = 0xEC, ID = 0xF1
NAND: 128 MBytes
In:    serial
Out:   serial
Err:   serial
Net:   MSVC00B000100100440822TH0000000T

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EnvFlag =: 0xB65008EC.....CONFIG_ENV_ADDR=: 0x1E0000
Check USB port[0]:
Error, couldn't init Lowlevel part
Check USB port[1]:
Error, couldn't init Lowlevel part
Fail to get miu settings. Use default.
keypad_pressed_1 is:0
keypad_pressed_2 is:0
keypad_pressed is [0]
ir_pressed is [0]
check_sw_upgrade
usb_complete=0 Or NULL
check_usb_upgrade
Hit any key to stop autoboot:  0
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