Question about HP Compaq nx6325 Notebook

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After turning screen ix initially blank although backlight is on. Gradually vertical stripes appear of varying width and colour. Eventually lines change to horizontal bars howing sections of the correct display. Correct display shows on external monitor.

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Your display is faulty. Check out ebay for a replacement. Changing the display is straight forward. If you get your display we can instruct you on replacing it.
Hope that helps.

Posted on Nov 09, 2010

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6ya6ya
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Posted on Jan 02, 2017

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I have a 46" toshiba zf355. when i first turn on the tv i get vertical lines...


This is the basic guide that can be applied to most LCD flat panel TV.
By Bud Martin
First, try unplugging it from the outlet for about an hour to see if the TV will reset itself since the minute the TV is plugged into the wall, the power supply and processor will be running 24/7 and the EPROM can get corrupted by spikes and surges. Try using good quality surge suppressor to see if it will help if it happen often.
Look for burnt brown hot spots on the circuit boards, capacitors with leaking/bulging top or seals. Loose wires and connectors. Blown fuses.
Notes: We are dealing with high voltage that can kill you! so if you are not sure what you are doing, please have it fixed by the pro that has proper tools and safety equipment. Try to use GFI outlet and isolation transformer when work around the TV set and DO NOT DEFEAT THE GROUND PIN OF THE OUTLET/POWER CORD.

1) The power supply module (There are 4 regulated output voltages:- Standby 5vdc, switched 5vdc, 12~16vdc, and 24vdc).

The power supply converts the 120/230vac 50/60Hz into DC, then the high frequency (50~100kHz) switching circuits convert it back to AC but at high frequency which allows the power supply to use smaller and much lighter weight transformers (Ferrite core instead of heavy iron core), then this high frequency AC voltage is fed to the rectifier Diodes to get the DC output and filtered by DC filter capacitors that must have low ESR (Equivalent Series Resistance), if general purpose electrolytic caps are use, they will fail within a year or less due to high ESR.

The power supply has Standby 5vdc (5VSB, this is a MUST have before anything else will work, when this voltage is not present, there will be no any indicator light on the front panel) which is always on the minute the TV is plugged into the AC outlet, so it is on 24/7 and that is why the power supply will fail even though you may use the a TV not very often. It will see all the voltage spikes and surges 24/7.
This 5vdc is used to power the Processor and the Infrared remote receiver module which will be waiting for the command from the remote control or from the power switch, when the Power on command is received, the Processor will send the turn on signal (3.3~5vdc) to the power supply module (PSON pin) to the switch on the main 5vdc for the rest of the logic and Tuner circuits, 12~16vdc for the sound amplifiers (mostly Class D amplifier for efficiency and small size) and for the T-CON board (interface board between the LCD panel, some T-CON uses 5vdc, and the Logic board), and 24vdc for the Back lights inverter board (if there is no 24vdc then no back light).
Common failures:
Blown main AC fuse due to shorted out Diodes, transistors.
Bad capacitors leaking or bulging tops:
Shorted Diodes, transistors in the DC output side.

Testing the power supply output with dummy load:
24vdc testing: Disconnect the wires that go to the inverter board first. You can use two #1157 (using both Lo & Hi filaments by paralleling them at the base) car light bulbs connected in series so they can handle the 24vdc, this will put light load (about 70w) on the 24vdc output, the voltage out should be steady at 24vdc (+/-2v), if not, the power supply has regulation problem.
12vdc testing: disconnect the 12vdc TV load from the power supply board and attach one #1157 (using just the Hi filament), the 12vdc output should stay at 12v (+/-1v), if not, the power supply has regulation problem.

You should see the lamps go on when the TV power switch is ON and go OFF when the TV is powered OFF.

2) Main Logic board (It has Processor, Tuner, Sound Processor, Sources selector, Power amplifiers for speakers, interface port to the T-CON board for pictures).
This logic board sends out the turn on signals (3.3~5vdc) to turn on the rest of the Power supply module (Switched main 5vdc, 12~16vdc, and 24vdc), Inverter backlight ON (if no back light on command then there is no back lights),
Logic board supplies 5 or 12vdc to T-CON board B+ pin through switched transistor if T-CON board does not get the voltage from the logic board, you will get white/gray glowing screen without pictures.
Back lights Dimming (PWM) control signal.

3) Back lights Inverter board. Its job is to provide the drive voltage for the CCFL (Cold Cathode Fluorescent Lamp) to give white light for the screen.
This board is fed by the switched 24vdc (VBL) from the power supply module, it also get the Back lights on (BL on) control signal and the Dimming (Dim/PWM/) signal from the logic board. So for it to work, it needs 24vdc and the BL_ON signal.
Common failures:
Blown surface mounted fuses due to shorted transistors/ICs, Transformers.
Bad capacitors.

4) The T-CON (Timing Control or LCD controller) board (on the LCD panel assembly). It transfer the universal image signal of TTL and LVDS signal to specific TFT (Thin Film Transistor) LCD.
This is the interface board that talks to the Logic board and the LCD panel to produce pictures on the screen. White/gray glowing screen when it fails or not getting the voltage from the logic board (the 5 or 12vdc is supplied by switched transistor on the logic board). Notes: T-CON board is mounted under the metal cover shield.
Common failures:
Scrambled pictures, Lines, multiple pictures, color smears/blotches, rolling pictures after warm up.
Blown surface mounted fuse.
No pictures, very dark screen almost like there is no backlights.

5) LCD panel assembly to display pictures. The LCD pixels will block or unblock the back lights from the back of the panel to the front of the panel. This is the most expensive part of the TV, it will be more than the TV is worth.

As you can see, you must have all the above Voltages and signals for the TV to work properly. This may help you narrowing down the bad modules instead of buying the wrong module just to find out later that it did not solve the problem. Hope this will help you out.

Sound problem:
Let verify first to narrow down to where the problem can be. First, check the on screen sound set up menu to make sure the speakers are not set to OFF. If the setting is OK, then attach the powered PC speakers to the Audio Line out RCA jacks to see if you can get the sound there, if you do, then the problem can be in the power amp circuits, if you do not get the sound at RCA jacks, then the problem can be in the sound processor circuit. To get the sound repair, it can be from $150 and up, so if you can put up with using the good set of Powered PC speakers which actually give better sound than the tiny speakers inside the TV, I would keep using it that way, you may want to find out if the on screen sound setup will allow you to set the audio line out to be VARIABLE which means the sound output feeding the PC speakers can be varied using the TV remote control, then all you have to do is to set the PC volume to about half way up and set the TV volume to what ever you want.

Inverter board connector: you can also see the Fuse 4A/160V
http://i.fixya.nethttp://i.fixya.net13ca788.jpg
Power supply connector:
http://i.fixya.nethttp://i.fixya.net78e0d9a.jpg

http://i.fixya.nethttp://i.fixya.net2fc510f.jpg
T-CON board: (metal cover shielding is removed to show the bd.)
http://i.fixya.nethttp://i.fixya.net0b5367e.jpg
Inverter board:
http://i.fixya.nethttp://i.fixya.netaf0a695.jpg
Logic board:
http://i.fixya.nethttp://i.fixya.net4bd108e.jpg
T-CON board is dead, no power or blown fuse on the board, screen turns WHITE, must see it in darkened room, otherwise you may mistaken it for failed backlight.
http://i.fixya.nethttp://i.fixya.net3a91b68.jpg
Bad T-CON board after warm up, you get lines, multiple pictures, strange colors blotches, etc.
http://i.fixya.nethttp://i.fixya.netd3cf194.jpg
Bad caps (leaking/bulging tops). Make sure to replace bad cap with good cap such as PANASONIC FM or FC series , they are Low ESR (Equivalent Series Resistance) which is a must for switch mode power supply, and 105c rating. Do not use generic electrolytic caps.
http://en.wikipedia.org/wiki/Capacitor_plague

http://i.fixya.nethttp://i.fixya.netbe827ec.jpg
Bad T-CON board or power supply problem

http://i.fixya.nethttp://i.fixya.net034e1db.jpg

24vdc power supply output testing using two 12vdc car lamps in series.

http://i.fixya.nethttp://i.fixya.net4f2929c.jpg
Bad LCD panel, vertical 1~2 pixel wide lines
http://i.fixya.nethttp://i.fixya.net28e50c1.jpg
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm

Free service manuals: www.elektrotanya.com

on Jan 15, 2011 | Sony BRAVIA KDL-40S2010 40 in. LCD...

Tip

How to reset nokia mobiles life timer to ''0''


Nokia life timer is a counter that keeps track of the Total call time of your phone. It will show how much the phone has been used, and it?s the best thing to check if you?re planning to buy a used Nokia Mobile.
To see the Total Call Time or the life timer counter, On the standby screen type the following code *#92702689# (Easy way to remember this is ? *#war0anty#). And it will pop up a message that shows the life timer in hours and minutes.

Here is a detailed procedure to make this life timer zero.


REQUIREMENTS:
The following files are required to reset the life timer:
  1. Nemesis service suite link: Download from Here
  2. lifetimer.pm file: Download Here
PROCEDURE:
1. Download and Extract the lifetimer.pm file, and Download Nemesis Service Suite.

2. Install Nemesis Service Suite on your Computer, It won?t take much time.(select the first option)

3. Install Nokia Cable Drivers (No need to install, if you have Nokia PC Suite already installed)

4. Connect The Phone in ?PC Suite? Mode to the PC

5. Open Nemesis Service Software

6. Click on ?Scan for new Device? Button on Top right Corner 



7. It Will take a few seconds to scan, and it will load up the software interface after communicating with the Phone.

8. Click the ?Phone Info? Button.


9. On the Bottom, Select and open the ?Permanent Memory? Tab, which is next to the Fbus info.


10. Click the ?Write? button on Below right, and open the Extracted lifetimer.pm file on your PC. 


11. After the lifetimer.pm file is opened , it will immediately start writing it to the Phone?s EEPROM Area.




12. The Procedure will end when the progress bar reaches 20%. This is normal , and on the bottom right side, it will display its done.

13. Unplug the Phone, and Restart it.

14. After boot up, Check the life timer .


Note: This method has been tested on following devices: Nokia 6630, 6670, 6680, 5500 sport, 5700XM, 6110 Navigator, 6120 Classic, N70, N72, N73,N76, E50, E51, E61i, E65, N80, N91, N95, N95 8GB, 5800XM Mobile devices. If you want to try it on other S60v3 or S60v5 mobiles, do it at your own risk.


Caution:
  • Power Failure During Writing will cause damage to the Phone, And there is a chance that it might brick the phone as well.
  • Loose, worn out Data Cables Might fail the Writing process, and there are chances of damage to the EEPROM area of the phone.
  • Do not attempt this with phones that are not included in the confirmed list.
By:- Mohammed Abdulhadi

on Jun 21, 2010 | Cell Phones

1 Answer

I have a Sony KDL-32BX300 showing vertical lines. Is this repairable?


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

Apr 30, 2015 | Sony Bravia KDL-32BX300 32" 1366 x 768...

1 Answer

Vertical rainbow stripes on my GB color


I would say that the screen is causing the lines in a gameboy colour the lines are not the same like it would be in an orginal gameboy the one with the four batteries. Lines in gameboy color are the screen issues then the whole screen would have to be replaced on the GBC then.
4_30_2016_9_15_55_pm.jpg

May 18, 2013 | Nintendo Game Boy Color Console

4 Answers

How to fix vertical black line on panasonic viera th-42pz80


If you let me know in which location of the screen is located I can assist with the possible cause since the vertical line can be caused by different items based on where its located on the Screen such as center of screen, or far right side or midle of the right half side of the screen. Reply to this same post with where the line is located and I will assist you with it.

Oct 16, 2011 | Panasonic Viera TH-42PZ80U Plasma TV

1 Answer

Intense white & coloured horizontal line on black background on startup


I wouldn't attempt as the capacitors on a tv store around 25000 volts this is more than enough to kill you and they keep there charge even when the tv is off. Either take it to a repair shop or put that money towards buying a new tv - Do not even attempt to open the tv. (It sounds like maybe a tube has gone or the electromagnet that makes the beam move vertically is gone.

Sep 03, 2008 | Televison & Video

1 Answer

New LCD TV Not Working!


dear one

your this probleam is with inerface card which built in tv .so called your service pepole and ask him to reinstalled the input interface card again. if you not taken it seriously it may a big problem for your tv in futre so just take an a action

Jan 24, 2008 | Televison & Video

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