• TV LG 47LB652V-ZA stand on Logo LG

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  1. Naslov teme mora vsebovati: proizvajalca naprave, poln model in kratek opis okvare.
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  6. Zahteve za sheme, boardview, fotografije matičnih plošč, datoteke BIOS-a ali servisne priročnike za storitve NISO DOVOLJENE. Če želite vprašati za katero koli od teh, odprite novo temo v podforumu ZAHTEVA ZA DOKUMENTACIJO & DATOTEKO BIOS/EFI.

#1 TV LG 47LB652V-ZA stand on Logo LG


Napisal/-a valieromarco 18 Marec 2020, 20:49
This TV power on and when LG logo appears image is blocked, all command is disabled, it is possible power off unplugging power cable.
Someone had the same issue?

Re: TV LG 47LB652V-ZA stand on Logo LG


Napisal/-a Google Adsense [BOT] 18 Marec 2020, 20:49

#2 Re: TV LG 47LB652V-ZA stand on Logo LG


Napisal/-a matic 18 Marec 2020, 22:33
Hello!

It may be a corrupted firmware or bad FLASH chip. You should reflash/replace the FLASH chip, but it is not easy on this board, because the FLASH chip is in the BGA package if I'm not mistaken. It is also very hard to get a proven dump, except if you have another the same board in working condition or with a different issue.

You can try to heat / freeze the FLASH chip when the TV is turned off and turn on the TV, when the FLASH chip is hot / cold. It sometimes help, if the FLASH chip is bad.

I had the same case on older LG TV. In my case reflashing the FLASH chip solved the issue (mine FLASH chip was in the TSOP48 package).

#3 Re: TV LG 47LB652V-ZA stand on Logo LG


Napisal/-a valieromarco 18 Marec 2020, 23:50
Ok but heating or cooling the chip if tv turns on I can reflash firmware or is not necessary?

#4 Re: TV LG 47LB652V-ZA stand on Logo LG


Napisal/-a matic 19 Marec 2020, 13:21
valieromarco napisal/-a:Ok but heating or cooling the chip if tv turns on I can reflash firmware or is not necessary?
If the TV reacts to heating / cooling the FLASH chip it means that the FLASH chip is bad and needs to be replaced.

#5 Re: TV LG 47LB652V-ZA stand on Logo LG


Napisal/-a valieromarco 19 Marec 2020, 14:27
I tough was a solder balls issue like GPU, there is a seller who sell EMMC for LG motherboard programmed, but he told me that smart card hardware will not work anymore.
Is it the firmware chip?
I found an used motherboard €70.
Chip was damaged by a thing or is it a known LG defect?

#6 Re: TV LG 47LB652V-ZA stand on Logo LG  [REŠENO]


Napisal/-a matic 19 Marec 2020, 16:26
It is probably also possible that the connections (solder balls) between the FLASH chip and APU are broken, but I haven't had this case on TV yet. You could try to reflow the FLASH chip and APU to exclude that option, but I think it is more likely FLASH related issue.
I think the eMMC and FLASH is the same thing, but I'm not 100% sure.

I don't know how often is this defect, because I don't have much experience with TV motherboard repair. I had such case once as mentioned.

#7 Re: TV LG 47LB652V-ZA stand on Logo LG


Napisal/-a valieromarco 20 Marec 2020, 18:34
Hello
After reflowing NAND it started again, so I have update firmware and now tv never stuck on logo.
I’ve just wait for few days to know if problem was bad firmware or is a the chip damaged
Thanks.

Re: TV LG 47LB652V-ZA stand on Logo LG


Napisal/-a Google Adsense [BOT] 20 Marec 2020, 18:34

Kdo je na strani

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