You can find out here if you have the same problems or symptoms of your LCD televison. you can find the other brands of lcd tv with same or similar symptom to get some ideas. Because the LCD tv theory for all brands/manufacturer are same. So, these LCD tv repair tips are suitable for use as a reference.
Note: These troubleshooting tips are not guarantee that you can fix your unit right away and won’t solve all the component problems you may run into, but they should solve a good number of them. Servicetron.com is not responsible for any damage as a result of following any of this advice.

Hitachi 37ld6600: no sound or intermittent sound
model/s: hitachi 37ld6600, 37ld6600a lcd tv
symptom: no sound or intermittent sound
cause: pins of headphone socket touching the chassis.

Hitachi 37ld6600: mechnical noise from screen only in cinema mode
model/s: hitachi 37ld6600, 37ld6600a lcd tv.
Symptom: mechnical noise from screen only in cinema mode
cause: high back light setting on cinema mode.
Backlight settings are different for each mode :
dynamic:  00
natural:  50
cinema :  100
cure/solutions: reduce backlight settings in cinema mode from 100 to 59 as follows.
Enter service mode with the remote control,
press menu
4725  or  1267  or 1461 (there are 3 different software versions, only one code will work)
service menu will appear, select pic adjust and enter with vol+
a second service menu will appear, the bottom adjustment in the menu is back light setting and will be set to 100.
From the mode heading select cinema mode.
Select back light and reduce the setting to 59.
To memorise and exit service mode press standby.

Hitachi 32ld7200: distorted sound/audio
model/s: hitachi 32ld7200 lcd tv
symptom: distorted sound/audio
sound is distorted when the set is first switched on. After a while the fault clears and the set works normally.
Cure/solutions: replace joint pwb. P/n: tp01336.

Hitachi 32ld6600: no picture, but sound ok
model/s: hitachi 32ld6600_a_b_c lcd t v
symptom: no picture, but sound ok.
Cause: dry joints on components s627 and s629 near connector pl308 on the main board.
Cure/solutions: resolder components s627 and s629 and also check other components for dry joints near the connector.

Hitachi 32ld6200: unit does not switch on or fails to power on
model/s: hitachi 32ld6200_a_b_c lcd tv
symptom: unit does not switch on or fails to power on
unit does not work, standby led not lighting.
Cause: working of pixelworks controller ic21 depends on ambient temperature.
If the ic is heated externally the unit starts to work normally.
Cure/solutions: replace ferrite bead l500 and l501 with a jumper wire.

Hitachi 32ld6200: set fails to power on/switch on
model/s: hitachi 32ld6200_a_b_c lcd tv
symptom: set fails to power on/switch on.
If mb11-6 main board is used instead of the original main board mb11-2 the unit won't switch on.
Unit switches off immediately and a clicking noise comes from the power regulator board.
Countermeasure:
replace the lvds cable (p/n: vs30041693) and add a 47uf(p/n: vs30000396, cap el47uf16v) electrolytic capacitor to power regulation board .

Hitachi: picture display problem
model/s: hitachi 32ld6200_a_b_c, 32ld6600_a_b_c lcd tv
symptom: picture display problem
cause: various picture problems can be caused by poor connection of the lvds cable on connector pl103 on the main board.
Cure/solutions: remove lvds cable from connector pl103 and reinsert carefully.
Make sure both end of the lvds cable are inserted properly between pl103 and the display panel.

Hitachi: intermittent colour or no color
model/s: hitachi 28ld5200e lcd tv
symptom: intermittent colour or no color
colour drops out after the unit has been running for two to three hours.
Cure/solutions: resolder capacitor c510 and other components in its vicinity.

Hitachi: poor image quality or solarisation of image
model/s: hitachi 26ld6600 & 26ld6600a_b_c_d, 32ld8a10, 37ld6600, 37ld6600a & 37ld8500, 37ld8550, 37ld8600, 37ld8700c, 37ld8700ca, 37ld8700u, 37ld8700ua, 37ld8a20, 37ld8d10, 37ld8d20e, 37ld8d20u   lcd tv
symptom: poor image quality or solarisation of image
this phenomenon may be very intermittent and only displayed after a number of hours/days on soak
cause: the glue on the ldvs cable heats up over time and the properties change and creating a contact problem within the cable and the pcb. This causes permanent or intermittent picture problems
cure/solutions: remove the ldvs cable and clean the connections at the lcd control panel and replace the lvds cable.

1) part:vs30044366 cable 30p/130 qdia ul20276
reference:lvds cable
lcd-panel<->pwb main. To fit models: 26ld6600, 26ld6600b, 26ld6600c, 26ld6r10, 32ld8700cb, 32ld8700ub
2) part:vs30044576 cable 30p/150 lvds+fer ul20276
reference:lvds cable
lcd-panel<->pwb main. To fit models: (26ld6600a, 32ld6600, 32ld6600a)
3) part:vs30044866 cable 30p/150 lvds 32cmob1
reference:lvds
pl103 <-> screen v320b1-l01. To fit models : 32ld6600b, 32ld8a10, 32ld8600, 32ld8700c, 32ld8700tu, 32ld8700u
4) part:vs30042003 cable connector lvds 30p/230
reference:lvds
connector main <-> panel. To fit models : 32ld6600c, 37ld6600, 37ld6600a, 37ld8600
5) part:vs30053003
cable lvds 30p/150 w/dc+f ul20
reference:lvds
connector main <-> panel. To fit model: 26ld6600d
6) part:vs30051803
cable lvds 30p/180 32cmob1
reference:lvds
äpl103 <-> screen v320b1-l04. To fit models: 32ld8a10a, 32ld8600a, 32ld8700ca, 32ld8700tu, 32ld8700ua
7) part:vs30054878 cable lvds 30p/130 ul20276
reference:lvds cable
to fit model : 32ld8600b
8) part:vs30048584
cable lvds 30p/230
reference:lvds cable
to fit models : 37ld8a20, 37ld8d10, 37ld8d20e, 37ld8d20u, 37ld8500, 37ld8550, 37ld8600, 37ld8700c, 37ld8700u
9) part:vs30051781
cable lvds 41p/230 37"hit
reference:lvds cable to fit models : 37ld8700ca, 37ld8700ua, 37ld8600a

hitachi: socket change on power board 17pw15-9
model/s: hitachi 26ld6600 & 26ld6600a_b_c_d lcd tv
tip: socket  change on power board 17pw15-9
change: on the new version of power board 17pw15-9, socket pl805 has been changed to a 13 pin. On the earlier version of the power board socket pl805 is 12 pin. When new power board with 13 pin ( pl805 socket ) is fitted to a set, the connector lead from socket pl805 must be changed .

Hitachi: audio is distorted constantly and may have some background noise
model/s: hitachi l32a01, l32a01a, l32h01e, l32h01ea, l32h01u, l32h01ua, 32ld8d20e_ea, 32ld8d20u, 32ld8d20ua lcd tv
symptom: audio is distorted constantly and may have some background noise
cure/solutions: replace d845 and d846 (both uf5402 3a/200v 150a, part number: vs30009366) on the power supply board/psu.

Hitachi: change of power supply from type 17pw15-8 & 17pw15-9 to 17pw20
model/s: hitachi 26ld6600 & 26ld6600a_b_c_d, 32ld8a10 lcd tv
tip: change of power supply from type 17pw15-8 & 17pw15-9 to 17pw20 the original power supply, version 17pw15-8 & 17pw15-9 has now been changed to the later version 17pw20
when fitting the new power supply, it may also be necessary to replace two cables with a new type as described below.
There is one new part number to replace all this new part number will supply a kit that includes the power supply and the necessary new cable which you should use if required remove the following connecting leads used with power board 17pw15-8

1.remove cable from power board connnector pl806 going to mainboards mb15e-5 or mb15e-7 connector pl902.
2.remove cable from power board connector pl805 going to mainboards mb15e-5 or mb15e-7 connector pl900 .

Replace the two cables with the new cable type: order new cable part number vs30049856
changes:
insert new cable:
1. On the power board connect 12 pin connector of the new cable to pl805
2. On the main board:  connect the 7 pin connector of the new cable to pl902 and 12 pin connector to pl900.

Hitachi: fitting new main board type mb15e-7
model/s: hitachi 26ld6600 & 26ld6600a_b_c_d, 32ld8a10, 37ld6600, 37ld6600a, 37ld8600, 37ld8700c, 37ld8700u lcd tv
tip: fitting new main board type mb15e-7 when new main board type mb15e-7 is replaced instead of main board type mb15e-5 the following changes have to be made.
Remove parts:
1. Remove and discard cable between audio board (amp05) connector  pl709 and main board connector pl1001.
2. Remove and discard cable between audio board (amp05) connector pl704 to main board connector pl903
changes: order new cable part number vs30051586
insert new cable: on the main pcb connect 6 pin connector of the new cable to pl1004. On the audio pcb you must first check the version of audio pcb fitted to the tv. For audio pcb version amp05: connect the 5 pin connector of the new cable to pl709 and 2 pin connector to pl704 for audio pcb version amp03 : connect the 5 pin connector of the new cable to pl709. As pl704 does not exist on this version the 2 pin connector must be removed and the cable then soldered to legs of d700 and d701 as below.

Hitachi: hotel mode
model/s: hitachi 26ld6600 & 26ld6600a/b/c/d, 37ld6600, 37ld6600a, 37ld8600, 37ld8700c, 37ld8700u lcd tv
tip: to enter the hotel mode of this model :
1. Press menu
2. Press the following buttons in sequence: 1,3,2,5
the hotel menu will then appear then follow the screen guide.

Hitachi: change of audio/sound board
model/s: hitachi 26ld6600 & 26ld6600a_b_c_d lcd tv
symptom: change of audio/sound board.
Cure/solutions: new amp board amp 06 new amp board amp06 is used instead of amp03 board on the following models:
26ld6600, 26ld6600a, 26ld6600b, 32ld6600, 32ld6600a, 32ld6600b.
Start of change on production:
32ld6600b    serial number : v60700960 ~
26ld6600b    serial number : v60701453 ~
when new amp board (amp06) is fitted instead of the old amp board (amp03) new cables are required.

Hitachi: burn in mode when replacing main pcb
model/s: hitachi 26ld6600 & 26ld6600a, 32ld6600_a_b_c, 37ld6600 lcd tv
tip: burn in mode when replacing main pcb
when replacing the main pcb on these models, the new part may be in the 'burn in' mode from manufacture. This will result in the image on screen flashing different colours.
To exit the burn in mode:
use the remote control :
1. Press menu button
2. Press the following button sequence:  4,7,2,5 :
3. Go to “options” and then set “burn in mode” to either on or off.

Hitachi: audio noise may be heard from speakers when unit is in tuner mode
model/s: hitachi 26ld6200 lcd tv
symptom: audio noise may be heard from speakers when unit is in tuner mode and the volume control is set to near minimum.
Cure/solutions: add four smd jumpers on the amp board to positions j100, j101, j102 and j103 (jumper smd 0603 r).

Hitachi: retune of digital tv channels
model/s: hitachi 22ld4500uk lcd tv
tip: retune of digital tv channels
1.press the menu button on the remote control to display the main menu on screen all channels will automatically be installed.

Hitachi: no sound or very low sound on terrestrial and no sound on digital or any av inputs
model/s: hitachi 22ld4500u, 22ld4500uk lcd tv
symptom: no sound or very low sound on terrestrial and no sound on digital or any av inputs.
Cure/solutions: this is a software/firmware problem. Replace memory ic302 type 24lc16 (part number: vs20167612). All customer controls are set to minimum on the new ic. Please reset language and all picture controls to normal after replacing the ic.

Hitachi: green horizontal line flashing across the screen intermittently
model/s: hitachi 22ld4200 lcd tv
symptom: green horizontal line flashing across the screen intermittently.
Cure/solutions: remove resistor r149 on the input signal board (signal processing-analog) and replace it with jumper smd( 0 ohm, partnumber: vs30001734).

Hitachi: no switch on from standby
model/s: hitachi l32vp03e, l32vp03u lcd tv
symptom: no switch on from standby if the tv is switched into standby when it has been running for some time and is warm, it will not come out of standby until the set has cooled completely
cure/solutions: replace the crystal x104 (xtal 14.318mhz 20pf 20ppm smd rohs, part number: vs30054926) on the main pcb/main logic board, the system control section.