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Equipment Repairs => LCD TV forum => Topic started by: kennyc on November 25, 2014,10:58:11

Title: Samsung LE32R88BDX comes on after 1hour
Post by: kennyc on November 25, 2014,10:58:11

Hi guys ,the TV comes on after about an hour . Have changed the 5 caps on top right hand side but still the same .  Dont know if its the power supply or main board any ideas . Power supply is a bn44-00155a. Thanks

Title: Re: Samsung LE32R88BDX comes on after 1hour
Post by: Turnip on November 25, 2014,12:21:34

Hi Kenny,

Power  Dong Yang   BN44-00155A
1.   Check P/S caps  Typical cap repair kit – CM851/CM852(both 1000/35) CM856(1000/25) CM861(1000/10) upgraded to 25v  CB852(2200/10) upgrade to 25v (see piccy)
Possibility that duff caps can brick the main board.
  
2.   Just red led – check RM801(R22) for O/C as glue on C810(2n2) flashes over – (see piccy)

Other PS problems – RB806(100k/2W)  DZP801(BZX84C18)
DZT855(BZX84C6V2)RB801(100k/2W) ZDB805(15v smd Zener)

Important – scrape off the glue – as it becomes conductive and phuts most everything on the power board.

Just a thought from Quuq folks files - Chris.

Title: Re: Samsung LE32R88BDX comes on after 1hour
Post by: downunder on November 26, 2014,03:26:03

Hi Kenny,

Good advise from the guru.

Suggest try a factory reset when the unit eventually comes on. It's in the Service menu. Not guaranteed, but one has to try these things, especially if those caps have corrupted the eeprom.               Bruce

Title: Re: Samsung LE32R88BDX comes on after 1hour
Post by: Turnip on November 26, 2014,11:23:25

Hi Bruce,

Ken says it comes on after half an hour, so guess no corruption yet, but wait a bit and it surely will - Chris.

Title: Re: Samsung LE32R88BDX comes on after 1hour
Post by: kennyc on November 26, 2014,16:51:37

Hi Guys ,its a bit like the chicken and the egg now .It doesnt come on at all now so suspect its been corrupted . Customer used to leave it to come on . Dont want to get a power supply and be left with the main board faulty although maybe reset would work

Title: Re: Samsung LE32R88BDX comes on after 1hour
Post by: leonard085 on November 27, 2014,05:28:24

If you think the eprom is now corrupt, you could use a programmer to blank the eprom
as this unit will reprogram the eeprom when when you switch on the unit if there is a blank eprom
If you don't have a programmer, put in a new blank ic 24c256

Title: Re: Samsung LE32R88BDX comes on after 1hour
Post by: cheeky2 on December 20, 2014,14:28:14

I had a similar issue a while back on the same model. I found two capacitors on the main board had gone high esr. The caps are under the metal screen and if you heat up the metal screen with hair dryer or heat gun and see if it comes on.
 Just had a look they are C1177 & C1110 1000UF 10V originally thought it was the bga were at fault!
Good Luck & Happy Christmas :)