Sony KD 49X8307C

[Donny2derby]

Ok Diah thanks for the complete explanation.

I will take the board to work tonight and try to heat up from the bottom. But it will be tomorrow when I get up that I plug board back in and try it again. Is this going to be ok or do I need to heat up and try immediately after it’s cooled?

[Diah]

Ok Diah thanks for the complete explanation.

I will take the board to work tonight and try to heat up from the bottom. But it will be tomorrow when I get up that I plug board back in and try it again. Is this going to be ok or do I need to heat up and try immediately after it's cooled?

no need to hurry... from down side heating.. are good as from top... just be aware the soc or boards didn't move during the heat process and cooling down.. if it work good if not also good that you have tried... 15-20 second heating are enough.... hope u upload of tv with picture tomorrow.

but don't borrow neighbor tv photo ...lol

[Donny2derby]

Ok Diah. 10-15 seconds on 275 degrees from the underside of MB. Hope you appreciate my ingenuity! Pressurised cans as stands😅

[Diah]

Ok Diah. 10-15 seconds on 275 degrees from the underside of MB. Hope you appreciate my ingenuity! Pressurised cans as stands😅

NASA SPACE Shuttle

[Diah]

you need to remove the black heat sink and the metal weight put it on the top of the chip

[Donny2derby]

Ahh I see Diah. You mean heat up the chip below the heat sink?

I have also made a more sensible set of stands😅

[Diah]

yes.... now correct

[Donny2derby]

Ok we seem to have gone backwards here Diah😅 all boards back together and tried to power telly up, not even getting the white standby light. Attempted hard reset and nothing at all appears to happen.

Under further examination I also don’t seem to have the 12v DC on CN6401 anymore. That’s tested to chassis with the MB plug in and out!

[Diah]

Ok we seem to have gone backwards here Diah😅 all boards back together and tried to power telly up, not even getting the white standby light. Attempted hard reset and nothing at all appears to happen.

Under further examination I also don’t seem to have the 12v DC on CN6401 anymore. That’s tested to chassis with the MB plug in and out!

do you have standby 3.3V on the power boards socket ??

list all voltage you have on the socket at PSU which it go to mainboards

[lotas]

You killed the motherboard with your warming up, don’t do that again!

[Donny2derby]

do you have standby 3.3V on the power boards socket ??

list all voltage you have on the socket at PSU which it go to mainboards

I have standby 3.3. & 3.3v on AC-OFF-DET. Apart from that, nothing anywhere else. 12v REG & T-CON all completely dead.

[Donny2derby]

You killed the motherboard with your warming up, don’t do that again!

Are you thinking I did this on purpose? I heated it up at 275 degrees for no more than 20 seconds. As I was told. If I was too close to the chip then maybe it went too high too quickly? I don’t know. But if all you want to do is criticise please don’t bother!

[Diah]

I have standby 3.3. & 3.3v on AC-OFF-DET. Apart from that, nothing anywhere else. 12v REG & T-CON all completely dead.

then yours heating process didn't went well... still there or new BGA point happened under the Soc you may bring it back to life..... nothings now you will loss ..however i never recommend thi methods to any one... but at your case only give try for it.

remove the 2 heat sinks black and white , use kitchen Aluminum paper make hut to cover all plastic sockets on the main boards, don't let the Aluminum paper touch the plastic sockets..
find weight to put it on the top of the Soc.. heat your oven to maximum... don't use air flew, just use the up and down to heat it... when it reach the high temperature put the boards on the oven plate and the weight on the Soc... leave it cooking for 20 minute, after that just turn off the oven and open the door carefully... leave the boards inside until it cool down and try.

[lotas]

Are you thinking I did this on purpose? I heated it up at 275 degrees for no more than 20 seconds. As I was told. If I was too close to the chip then maybe it went too high too quickly? I don’t know. But if all you want to do is criticise please don’t bother!

There was a very large load on the chip, in the center, and the board stood on four supports in the corners, and when heated, the board begins to bend downwards under the weight of the heavy load, turning it into the shape of a plate...

[Diah]

There was a very large load on the chip, in the center, and the board stood on four supports in the corners, and when heated, the board begins to bend downwards under the weight of the heavy load, turning it into the shape of a plate...

this is unlikely.. the boards was sitting over 4 standing cover about all boards except the soc area the soc are solid part.. .. but heating always 30% success... reballing only.the professional work.... but he is house user... so we use simple way.. because MB cost >100$

[lotas]

nomoresonys has already roasted his board from Sony TV in the oven and what was the result.

[Diah]

nomoresonys has already roasted his board from Sony TV in the oven and what was the result.

search the forum.. many use this on my recommend only after ( NOTHINGS TO LOSS ) one vestel was dead BGA done + firmware. and more...
when you have the option only to replace boards... then why dont use try yours LUCK !!

[Donny2derby]

Ok thanks lads. At this point I’m thinking if I can’t find a new board for around £50 I will admit defeat. There are boards on internet for this price but currently out of stock. The oven heating process sounds risky and I don’t fancy running the risk of some small components coming detached and ending up in my dinner one night!

[Donny2derby]

There was a very large load on the chip, in the center, and the board stood on four supports in the corners, and when heated, the board begins to bend downwards under the weight of the heavy load, turning it into the shape of a plate...

The weight was no more than 200 grams. I possibly should have weighed it first to get exact weight and asked is this was suitable but it didn’t cause the board to sink during the process. Certainly nothing noticeable to the eye anyway.

If you would like to share what else I could of done in this situation to attempt repair please tell me.

[Diah]

i have complete boards of new TV transport damage Sony KD-49XD7004 android. work with IPS LG panel, no idea which panel yours are !!