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Broken Panasonic TX-42ASN658

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Barco800
Barco800 picture

I got a broken Panasonic that will not start. It does show the red front LED and the power supply delivers 5,3Volt standby. Only when you try to start by remote or push button on the set it will only flash the red LED and does nothing more.

After a while, the red LED will start to flash repeatedly 13 times.

Since the 5,3 Volt standby run straight to the main board I wanted to check there but no luck finding the schematics.

Any insights?

After several attempts the TV finally started and I could enter the menu screen. Normal functionality. But after switch off it takes again several attempts. What is going on ?

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manyizoli
manyizoli picture

Hi,

I think your tv has emmc problem, you need change emmc with good data.

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Barco800
Barco800 picture

Hello manyizoli,

thanks for the hint! After some research I found a German website where the reprogramming is explained. But the process relies on obtaining the original data from the very chip by repeatedly starting and reading the memory contents (and comparing the readouts until you find one that has no errors in it).

Is there a safer way to obtain the data? Memory dumps from good machines?

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manyizoli
manyizoli picture

Hi, 

You can use other 42ASN658 dump, but netflix will not work.
You will have to change EMMC to new, and you need have special programmer.
If you can read old emmc (all partitions, and data is good) and this data write to  new emmc, than you have 50% chance.
I have had good same process (original dump + new emmc)

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