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Equipment Repairs => LCD TV forum => Topic started by: shaunp2008 on September 25, 2009,19:39:16

Title: Hitachi 32in 32ld8d20u no picture but have sound
Post by: shaunp2008 on September 25, 2009,19:39:16

I have an hitachi 32in 32ld8d20u, it has perfect sound but no picture, when you start the tv up the screen will light up then go dark, i have shined a torch into screen but not even any faint picture.

Was told that it would need a new inverter board which i have changed but still the same problem.

Anyone got any ideas as i would really like to get this fixed asap.

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: sparky on September 26, 2009,03:25:37

hi
check the supply to inverter panel should be 24v,
possible the panel faulty,one of the transformer sometimes
goes o/c
sparky

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: mulja on September 26, 2009,05:27:43

Hi
check on inverter board on pin 2,3 must be 3.3v and 2.5v
pin11 to 14 24v
if voltage present then 2 posible faults inverter board faulty
or on of bulbs in the screen shorting
but you shore what no back light becouse very common fault is on lcd controler board
no picture with back light present.

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: shaunp2008 on September 26, 2009,07:33:48

apparently there is 24v showing have changed inverter board and still no picture grr, not sure what else it could be, there is no slave inverter board in this tv either

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: sparky on September 26, 2009,07:37:55

hi
it points to the screen may be faulty

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: shaunp2008 on September 26, 2009,07:49:07

but you get light to the screen on startup

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: brian on September 26, 2009,09:12:02

Hi,

Had a look at Hitachi,s tech. site and the only cure listed,is to remove the glue, from the LVDS cable clean the contacts and replace the LVDS cable,may be worth investigating?
 good luck.
Bri.

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: shaunp2008 on September 26, 2009,11:03:06

well there is a sizzling from one of the transformers on the inverter board so maybe this is the problem, only just found it so going to maybe try and change the transformer as i have a spare? does this sound likely cause at all?

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: sparky on September 26, 2009,11:12:55

i thought you have changed the inverter board
is it the correct board

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: shaunp2008 on September 26, 2009,11:18:40

i got a board from ebay changed it but it wouldn't even show a backlight on startup where as the old one still does just a sizzling from transformer, so i've more than likely got a dud board,

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: sparky on September 26, 2009,11:23:39

try and find the faulty one try unsoldering it then transfer
one from the other panel you got from ebay
or use meter to measure the reading of the transformer to find faulty one
sparky

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: astracat on October 05, 2009,15:25:10

had one of these same problem,resoldered trany and soaked it with superglue no come back as of yet 2/3months on.ps flashover of glue tested at over 1kv

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: sparky on October 06, 2009,04:12:18

waste of super glue

Title: Re: Hitachi 32in 32ld8d20u no picture but have sound
Post by: Turnip on October 06, 2009,12:11:20

Hi Folks,

  Had a fractured core on largish monitor that knocked out the drive - superglue did it for me. Wouldn't help much with a short though, I suspect.

  Chris.