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Samsung LE37A656A1F goes to white screen after 2 minutes!

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cheeky2:
Great thanks Bruce for the information :)
 I haven't removed or replaced any as15-f ics so far so prefer to make sure before going ahead and replacing it. If i need to remove ics i tend to use a sticky aluminium foil and screen the surrounding components from the hot air gun! Then use isopropanol to clean up afterwards as the glue underneath the foil leaves a residue.
 
Having that info will certainly help quickly diagnose any future issues as well.

 I will let you know how it goes and results of vgama test point results

 Have a good week and be lucky :)

regards Anthony

Davy:
Had this with another SammySung model t'was the T'con board.... if you don't want to change the chip Emos will repair the board for you..... they charged around £30 including 1st class post see http://www.lcd-plasma-parts.co.uk/  Be sure to quote the board number.

Dave

cheeky2:
Thanks.
 I did see that they repair them when looking for a replacement tcon board for it. I will be testing the board later on today.
 Well the results were pretty conclusive!
The first 1-7 pins were between 15.24-14.93
pins 8-14 went from 6.64- 6.49
 The thing was i could see the voltages gradually creep up from the first 7 pins as the screen started to go white!
 Reading the comments below i am going to have a go at it as I am sure i can do it :)

 Thanks for the encouragement as i was just about to send it off!

Turnip:
Hi Bruce,

Surely change the chip first then theorise later.

AS15  series have most always been the problem with T-cons using this chip.

Mind you, have also read 'pin voltages', but the chip is mostly always duff - Hot or cold.

Quicker to replace it and see how it goes, takes 10 minutes at best - Chris.

downunder:

Pravda Chris,
What you say is true, but replacing the AS15 is not one of the joys of my life. Don't mind some other kind of chips though.

Bruce

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