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Equipment Repairs => LCD TV forum => Topic started by: Turnip on July 08, 2017,12:37:16

Title: LG 32LD490 - Suspect BGA issue.
Post by: Turnip on July 08, 2017,12:37:16

Hi folks,

Just had one in where it found no DVB channels, and with Scart input - Sound but no picture. OSG and control perfect.

Popped the SSB in the oven for 7 minutes at 180C using a clip thermometer, with the fan on but the element off. After 7 minutes oven was down to 120C - Success, even the HDMI worked.

Last time I relied on the oven itself at 200C for 10 minutes where several chips fell off - Chris.

Title: Re: LG 32LD490 - Suspect BGA issue.
Post by: downunder on July 08, 2017,21:20:26

and Coke and fries on the side?           Bruce

Title: Re: LG 32LD490 - Suspect BGA issue.
Post by: Turnip on July 10, 2017,10:40:24

Hi Bruce,

No actually, as the wife was due back and doesn't much like my cooking of anything, as seems menfolk never clean ovens, well, not in the UK.

She did however notice the pile of Black leggy chips after my first go, and was confused as she'd never had the issue in a lifetimes cooking, so suspected it was a curious 'Boy's Night' meal consisting of multi legged insects.

Only mentioned as really happy to get a positive result - Chris.

Title: Re: LG 32LD490 - Suspect BGA issue.
Post by: downunder on July 11, 2017,03:30:17

Hi Chris,

Men don't clean ovens the world over. It's a tiresome dirty job. Do you not place your boards on a baking tray? I screw up 4 bits of Alfoil into rough balls

and sit the board on these in the tray, but hey whatever works for you. Looks like you've found the formula.                        Bruce

Title: Re: LG 32LD490 - Suspect BGA issue.
Post by: Turnip on July 12, 2017,12:13:24

Hi Bruce, Guess so,

Just had a LG 47LD690-ZB in where initially the HDMI didn't, but all else was OK.

Sales chap tried sell it but every time he turned it on, something else was missing and eventually it didn't turn on at all.

Naturally no SSBs on Ebay so cooked it to perfection - Another winner - Thanks - Chris.

Title: Re: LG 32LD490 - Suspect BGA issue.
Post by: lolville on July 18, 2017,19:18:18

Quote from: Turnip on July 12, 2017,12:13:24

Naturally no SSBs on Ebay so cooked it to perfection - Another winner - Thanks - Chris.

Hi Chris. How do you make sure that the smd resistors and caps don't fall off?

Title: Re: LG 32LD490 - Suspect BGA issue.
Post by: downunder on July 19, 2017,03:26:01

Hi lol,

I've always placed the board print side down on a tray with some scrunched up balls of Al. foil under each corner. Cooking for 10 minutes in the oven preheated to 180 degrees, I have never lost any SMDs or had melted plastic in the sockets. After 10 minutes, don't move the tray. Just open the oven door and let it cool down naturally.
Everyone probably has their own method, but this works for me. Sometimes you will have failures too.                 Bruce

Title: Re: LG 32LD490 - Suspect BGA issue.
Post by: thoma on July 22, 2017,02:41:22

very interesting!Can you upload sme photos or videos of your methods?
regards thoma!

Title: Re: LG 32LD490 - Suspect BGA issue.
Post by: Turnip on July 23, 2017,11:56:26

Hi Bruce,

Time you uploaded to One's Tube. 

Agree totally but use an internal thermometer and when it hits 180C, cut the cooker element but leave the cooker circulating fan running for 'some' minutes. Open the door and let it cool. Not lost any chips since - Chris.