Sony KD-55X9005C - Unknown Backlight LEDs

[Davadaam]

Re: Sony KD-55X9005C - Unknown Backlight LEDs

mmartell, I replaced the LED strip that had the failed three LED chips on (they were all on same board) - straight swap. As explained previously, this didn't resolve the original fault, but it did change the symptoms - no picture (at all) but SMART light on t.v. was flashing alternate white - green. So I was hopeful then that I was on the right track. The only reference to green lights (that I could find) seemed to be software based. I suspected a problem then with the main control/logic board (the A/V panel) and as I had sourced one during the course of exploring the possible causes of my original fault (as identified by official repair manual) - a swap here as well resulted in fully operative t.v. - The LED component issue is not yet resolved - I am trying to obtain more chips & will update (might take a while!!!)

[nomoresonys]

Re: Sony KD-55X9005C - Unknown Backlight LEDs

SUCCESS!!!
Parts arrived afternoon 23rd, installed them yesterday (24th) - what I received was full aluminium panel (yep - all 1.3m X 0.5m) with LED panels and their connection ribbons (to the LD Driver board). I used a full panel (72 LED's on board) to replace the faulty board on mine - removed and replaced the thin (felt?) strip that is located full width above the three LED boards (light isolator or what?) ensuring that the thin heat transfer strip behind the panels was firmly against each of the (216 LED's) and the aluminium panel.
After re-assembly (no screws left over!!!) I stood the T.V up and switched on....white light....green light....green light.....(repeat...) no screen activity - switched it off tried again (repeat last symptoms...) - green light appears to indicate a software error, so, having a spare A/V (main) board - swapped them over and.....white light - swirling coloured orbs (holds breath...) then "Android" appeared.
Mounted T.V back on its stand, re-connected all the outputs (HDMI and optical audio), switched on - T.V powered up, back in shop display mode (with the SMART indicator light flashing blue, so after 2 software updates, first for the 200+ apps - no problem, and a second update (after trying to activate my Netflix account) - both updates were 30 minutes. All appears good after about 12 hours of operation.
Max kudos to anyone contributing here.
Questions remain though on the lack of support from manufacturer.
In relation to the faulty A/V (main) board - there MAY have been a slight misalignment problem on the connection ribbon to T-con board) I only noticed it during the change to spare board - Didn't want risk disturbing the repair to check!!!
Again brilliant forum populated by good people - now that I've time, I'll see is I can contribute anywhere with my limited knowledge.

Did you try to reapply the firmware on your original Mainboard?

[freakaftr8]

Re: Sony KD-55X9005C - Unknown Backlight LEDs

Agreed. some of these Sony's need to have firmware applied if any changes are made or if you had run the main board with the tcon disconnected at any time. Format a USB Flash drive to fat 32 and download firmware and unzip to flash drive-in an unzipped format so you can see the .bin file(s). Put Flash drive-in USB port of TV in turn on. Just wait the green Amber flashing will turn a white flashing. Give it about a 1/2 hour. TV will restart itself when it's done. Just be patient

[Davadaam]

Re: Sony KD-55X9005C - Unknown Backlight LEDs

Regarding the firmware - very likely this will be the case (I was keen to get the television working quickly and didn't pursue investigating the re-application via USB as you have stated. As I had purchased a good second hand board - this was the quickest check....
For anyone reading this - here's the final say from Sony (received today!)
Quote: -

"I am contacting you on behalf of Sony's Management to follow up with your query.
We would like to apologize for any misunderstanding regarding our spare parts & repair policy. We do not sell spare parts direct to customers. However, you can purchase some spare parts from our spare part partner - EET Group.
I would also like to advise you that it is not safe to repair your television by yourself and it would be best to have it repaired by an trained and authorized engineer.
Please contact our main service center for repair options.

Pacifica: XXXXXXXXXXXX Contact link: Pacifica

Should you have any further inquiries about any other Sony products, please do not hesitate to contact us again by replying to this email.

Hope you have a great day,

Kind regards, XXXX"

So, any doubts as to Sony support - there you have it.
Again thanks to everyone - Cheers

[zomi]

Re: Sony KD-55X9005C - Unknown Backlight LEDs

How did you separate the lcd on this tv
A friend of mine had one
i couldnt tell from the design how it would come apart
is it glued in ?

thanks