@vywsss bad panel really means bad LCD driver boards. Those are the long skinny boards that are the first ones that are connected to the LCD panel. They use some ribbon cables that are connected via a special bonding procedure. These boards are not replaceable by the DIY'er or even most pro's due to the way they are constructed.
The 5 blink code of this model is caused by:
Panel ID EEPROM I2C No ACK
(Also panel power failure is a suspect) [P_ID_ERR]
Data corruption in EEPROM[P_ID_ERR]
and referring to the Triage chart for this model the T-con module is considered the primary suspect followed by the panel.
If you still have the back cover open, takes some good pictures of your boards and the interconnect cables. Post those with your Question. That way we can see what you see.
If it is your panel, you can try a Tape-Off. Essentially that means you isolate some of the data lines on the ribbon cables going to the driver boards. There are plenty of videos on YT that will tell you how to proceed.
Repair is War on Entropy!
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
0