I need your immediate help : LE40B750

[erdem_ua]

Unfortunately, you make a big mistake.
There is no known way to recover this situation.
Since you installed 3000.2, you cannot recover your TV from ExLink too.
You needed to call Samsung Service...

[erdem_ua]

True, if you could reprogram flash using JTAG protocol (JTAG port is placed on dsub) you can revive that TV.
But we have no experience with it...
Regards.

[erdem_ua]

You needed to find an electrician who understands from JTAGging on your locale. It's not a thing that could be done from Net...

[erdem_ua]

It's same file with B650, T-CHL7DEUC from samsung download menu. But I don't think that if you could use that file to reflash your firmware. It's only "partial" flash at internet, not full one. So you needed to clone from another device. I have no experience on JTAG. And there could be some other options on JTAG firmwares... So best way that reading from device and writing to your device after...

[erdem_ua]

Hi guys ,
I was foolish to upgrade to 3002 on my LE40B650 and very unfortunate to have a power failure when attempting to revert back the firm as described in the forum.So i ended up with a bricked TV.I read that there isn't a way to fix it via ex-link cable.So my question is it possibile to change the mainboard by samsung service and have a working TV again or is it lost forever?
Any help will be highly appreciated!!!
Best regards

Possible.