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Equipment Repairs => LCD TV forum => Topic started by: Kev12175 on May 22, 2013,12:35:09

Title: Hitachi L42VC04UH Standbye
Post by: Kev12175 on May 22, 2013,12:35:09

Hi thought i would ask to see if anyone could help , My Hitachi l42vc04uh is stuck on standbye with a solid red light when you press any buttons ie power volume they just beep with no attempt of coming off standby. Has a 17pw26-4 power board and the power board is making a ticking noise and the tuner board the optical out is flashing red in time with the power supply tick . when the av board is disconnected the power supply sounds fine and help would be really appreciated thank you for taking the time to read kevin

Title: Re: Hitachi L42VC04UH Standbye
Post by: fix2003 on May 23, 2013,03:27:51

check the 14.3meg Xtal. X104 location left of main processor

Title: Re: Hitachi L42VC04UH Standbye
Post by: watteau on May 23, 2013,07:59:30

Hi,
Are all the power-supply voltages correct when the lead was disconnected?
If so, it could be a main pcb fault, loading the power-supply.
You could also check the usual power-supply faults: D983 SHORT,  either D883/D882 LEAKY.
regards,
John

Title: Re: Hitachi L42VC04UH Standbye
Post by: t1412 on May 23, 2013,13:42:21

hi also check R1036 0 ohm resistor

regards
shaun

Title: Re: Hitachi L42VC04UH Standbye
Post by: sinclairtv on May 23, 2013,16:57:10

Iv had 2 sets this week where the inverter board was shutting the set down. Disconnected the board and fed it with a scart from Sky and the sound came up. Replaced boards and sets worked

Title: Re: Hitachi L42VC04UH Standbye
Post by: Kev12175 on May 25, 2013,01:57:41

Thanks everyone for your help checked  the usual power supply faults seems fine , I am however no tv expert, I did find the 14.3meg Xtal. X104 but not sure how this is tested . Cant thank you all enough for taking the time to comment , might just change the av board and see what happens

Title: Re: Hitachi L42VC04UH Standbye
Post by: Kev12175 on June 04, 2013,15:17:17

 Ok have changed the tuner board and TV set powers up fine , only problem I am having is the backlight is flickering when on dtv only seems to happen with ariel plugged in , any thoughts thanks kevin

Title: Re: Hitachi L42VC04UH Standbye
Post by: Kev12175 on June 06, 2013,05:08:05

All fixed , first time install and retune resolved the problem , tv is working as normal and a big thankyou to everyone who gave some advice on this thanks again