Samsung LE32R88 cuts out

[EARLYBIRD]

Hi all.Anyone had a problem with a samsung LE32R88 ,The tv comes on for 19 seconds then cuts out ,restarts again automatically and 19 secs later goes again.This time between coming on and off never varies even if the set is warmed up.The power board is a BN44-00155A and the main panel is a BN94-01327A ?.Any one out there can help.Thanks in advance EARLYBIRD

[epi]

I've had problems with ZDB805 going o/c 15V smd zener diode.

[EARLYBIRD]

Thanks epi,Checked all SMD in this area all test ok changed 15v zener but still the same.I believe there is a repair kit for this model.Does anyone know who stocks them ,or better still know whats in the kit.

[epi]

Found this on a search, see if it helps:-
BN44-0155A faults:
RB806 100KJ 2W
DZP801 BZX84C18 Sot23
DZT855 BZX84C6V2 Sot23
RB801 100KJ 2W
Power Ground Output

[Smeden]

Typical repairkit for Samsung BN44-00155A contains the following:

CM851 & CM852 : 1000uF / 35V.
CM856 : 1000uF / 25V.
CM861 : 1000uF / 25V. ( upgrade of the original rated 1000uF / 10V )
CB852 : 2200uF / 25V. ( upgrade of the original rated 2200uF / 10V )

All Capacitors are radial electrolytic capacitors.
They should be highgrade & designed for Switching Supply purpose.

Other forums suggest upgrading the CM856, CM851 & CM852 as well to a higher voltage rating.
Especially if the board is used with LCD panels larger than 26" ( Techreport . com )

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Sometimes a faulty powersupply results in a failing A/V mainboard.
Please note that replacement A/V mainboards might contain firmware profiled to match the LCD panel used.
You can't be sure that a pulled mainboard will work correctly unless it comes from a TV with a similar LCD. panel.
Don't attempt to reset the EEPROM ( designated IC1803 ) on the A/V mainboard unless you're absolutely sure that the BN44-00155A Power Supply is fully functional!
( This might "brick" your board so use only as a last resort! )    

[michael first]

Hi,
there is a way to find out if the IP board is safe;take a look at the video in attachment.

[SBorovkov]

i had the same problem on le40r81.
Problem was solved by entering ingeneer menu, then turning "Ready" parameter to "ON" in the first submenu. That's all!