Hitachi Model LE55A6R9A bad backlight

[vortalexfan]

Hello everyone, topday a friend of mine had given me a Hitachi 55" flat panel TV Model LE55A6R9A from 2016 that apparently the backlight has died on it, and I'm wondering how easy that would be to repair?

The TV actually works otherwise and I think its an LED TV and its a smart TV that uses a Roku stick for its smart TV circuitry.

Are the LED TV backlights easier to repair than the traditional CCFL backlights?

Thanks for your help.

[vortalexfan]

Disregard this post, I found some youtube videos online about this, and figured out that its just a bad LED bulb on one of the LED backlight strips on the back of the screen.

Looks to be a pretty simple repair.

[JohnCT]

Originally Posted by vortalexfan

Looks to be a pretty simple repair.

It is until you crack the screen or suffer a debonding issue at the COF flex circuits... Be careful. Treat it like a bottle of nitro.

If you don't replace *all* the LEDs, you must be sure to run the backlight adjustment down about half way, or you'll be back inside within 6 months.

If there's no back light adjustment on this model, the current feedback resistors on the Source pin of the low side MosFet(s) can be raised in value to reduce the current supply to the LEDs.

John

[vortalexfan]

Originally Posted by JohnCT

It is until you crack the screen or suffer a debonding issue at the COF flex circuits... Be careful. Treat it like a bottle of nitro.

If you don't replace *all* the LEDs, you must be sure to run the backlight adjustment down about half way, or you'll be back inside within 6 months.

If there's no back light adjustment on this model, the current feedback resistors on the Source pin of the low side MosFet(s) can be raised in value to reduce the current supply to the LEDs.

John

Well unfortunately I did end up breaking the LCD Panel on this TV, which I'm guessing that means this TV is toast? Because I tried seeing if there were any replacement LCD Panels for this TV on feebay and they had nothing listed.
Is there maybe a source for replacement LCD Panels that I'm not seeing?

[JohnCT]

Originally Posted by vortalexfan

Well unfortunately I did end up breaking the LCD Panel on this TV, which I'm guessing that means this TV is toast? Because I tried seeing if there were any replacement LCD Panels for this TV on feebay and they had nothing listed.
Is there maybe a source for replacement LCD Panels that I'm not seeing?

Nope. Bad screen either by breakage, tab debonding, or bad COF chip means the end of the road.

Shipping a screen or the whole TV is expensive, and you won't know if the person who removed it wasn't careful with the those flex ribbons. If you have the room, put it aside and troll Facebook Marketplace for another with bad LEDs or better yet, bad main board.

If it's any consolation, even pros break screens.

Another issue I forgot to mention is that some screens use some tenacious double sided tape along the edge to hold the screen down to the plastic forms. Lifting the screen without gently heating and lifting the tape will also crack the screen.

I do the larger ones for a competitor of mine (he's a good friend LOL). I did a 75" Hisense for him that was about a year old, and I used four suction cups spread out along the screen and attached them together with rope to form a single handle.

Even when lifting the screen out, the four cups raise four hills on the screen - I've never seen a thinner screen at any screen size. How it didn't crack was a miracle. It took a lot longer to do this 75" than we budgeted for, and we've put that model on the do not fly list even though we got away with the repair. Just too much time for the replacement price point of this bottom feeder.

John

[vortalexfan]

Originally Posted by JohnCT

Nope. Bad screen either by breakage, tab debonding, or bad COF chip means the end of the road.

Shipping a screen or the whole TV is expensive, and you won't know if the person who removed it wasn't careful with the those flex ribbons. If you have the room, put it aside and troll Facebook Marketplace for another with bad LEDs or better yet, bad main board.

If it's any consolation, even pros break screens.

Another issue I forgot to mention is that some screens use some tenacious double sided tape along the edge to hold the screen down to the plastic forms. Lifting the screen without gently heating and lifting the tape will also crack the screen.

I do the larger ones for a competitor of mine (he's a good friend LOL). I did a 75" Hisense for him that was about a year old, and I used four suction cups spread out along the screen and attached them together with rope to form a single handle.

Even when lifting the screen out, the four cups raise four hills on the screen - I've never seen a thinner screen at any screen size. How it didn't crack was a miracle. It took a lot longer to do this 75" than we budgeted for, and we've put that model on the do not fly list even though we got away with the repair. Just too much time for the replacement price point of this bottom feeder.

John

Well That sucks, because this was a Roku Ready TV that came with a Roku Streaming Stick bundled with it that I thought maybe I could repurpose it to be used with my 60" Vizio I have currently, but apparently the Roku sticks that came bundled with Roku Ready TVs could only be used with those TVs which sucks.