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Equipment Repairs => LCD TV forum => Topic started by: Daddylonglegs on September 03, 2012,07:02:45

Title: HITACHI 19LD2550B no picture or OSD menu but sound ok
Post by: Daddylonglegs on September 03, 2012,07:02:45

Hi all,
I have a 19" HITACHI 19LD2550B LCD TV that has no picture. Sound fine and all button commands work. There is no sign of picture or any backlight. Menu's cannot be seen either. When the set is turned on a slight hiss can be heard when picture should appear. I have checked connections but have noticed a slight burn on the PCB board on a microchip. All capacitors seem normal.. Would a power supply problem cause loss of picture. Tried a bright torch on screen and cannot see anything. Any help would be greatly appreciated.

Title: Re: HITACHI 19LD2550B no picture or OSD menu but sound ok
Post by: jordan on September 03, 2012,09:25:28

Check/replace two inverters transformers for resistance changes (should be around 760 R)

Title: Re: HITACHI 19LD2550B no picture or OSD menu but sound ok
Post by: Daddylonglegs on September 06, 2012,17:24:50

Ok, are these on the PCB board?

Title: Re: HITACHI 19LD2550B no picture or OSD menu but sound ok
Post by: low.flying.pigs on September 07, 2012,19:29:00

Your set has a Vestel 17IPS02-2 combined Power Supply Unit and Inverter. You will find the inverter transformers on this board. If those look OK, I would also check the output voltages of the PSU before going any further. The circuit diagrams shows what to expect where.

http://www.tv.quuq.org/forum/index.php?action=dlattach;topic=5254.0;attach=2642

Be careful! Hope this helps,

low.flying.pigs

Title: Re: HITACHI 19LD2550B no picture or OSD menu but sound ok
Post by: Daddylonglegs on September 08, 2012,03:17:37

Thanks very much for info and link, new at this but willing to have a go.
will be careful.........

Title: Re: HITACHI 19LD2550B no picture or OSD menu but sound ok
Post by: sparky on September 08, 2012,03:43:03

hi
if you check past listing there are several cures for this
sm fuses,9pf caps near plug and skts for screen connectors
dave

Title: Re: HITACHI 19LD2550B no picture or OSD menu but sound ok
Post by: Turnip on September 08, 2012,13:14:00

Hi DLS,

Found prob is usually Inverter trannies 30058444 - secondaries should read 722 Ohms, replacements are available from ChasHyde - Chris.