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Compaq Presario CQ61 screen LCD cable change but not working

By terry5880
Mar 1, 2012
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  1. hi all got a post further down explaining lcd cable was no good so got another plugged it all on but now nothing coming on is there any button or anything i can do or is it another bad cable
     
  2. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    hi all as in previous tpost further down i explained screen comes on fully when little movement of lcd cable just where it plugs to mother board so got another wire but does same thing so now know it wasnt wire so thinking what inverter or lcd backlight please help as i do not want to buy 1 then its the other is the only way finding out by buying part and testing. thanks in advance
     
  3. Tmagic650

    Tmagic650 TS Ambassador Posts: 21,061   +169

    Alright, since you can move the new video cable near the LCD hinge and get video on the screen, it has to be a bad connection on the inverter. Sometimes the inverter connections burn and oxidize, or become loose
     
  4. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    yea mate i got a 2nd hand cable from ebay from good supllier tested and it does exact same as before touch the cable inbetween plug to mb and plug to inverter just near hinge and screen comes on fine soon as go to move again it goes off again sometimes pure black sometimes can see faintly the windows screen in the back ground.. so you reckon get inverter ?
     
  5. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    wow whole day but no one else posts ? thanks for your time tmagic
     
  6. Tmagic650

    Tmagic650 TS Ambassador Posts: 21,061   +169

    I was gone all day but my post still stands. Don't you think you know what I'm talking about?
     
  7. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    yea i got good ideal mate just wanted to be 100% as some people say could be backlight but like u and i say when i move the cable the screen comes on and i see back light all working as screen fully functional . your a top man and great asset to the site mate thanks T
     
  8. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    hi alll and tmagic i now changed inverter and still exact same thing u can see the screen faintly in the back groundif u move the screen about i looked for this lid closed switch as i heard it is in the area by the left hinge but i cannot see it anywhere what do u suggest now magic .. cheers
     
  9. Tmagic650

    Tmagic650 TS Ambassador Posts: 21,061   +169

    Replace the entire LCD panel. This includes the backlight. Although one more thing comes to mind. Is the LCD off (cover close) switch near the video cable?
     
  10. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    what do u mean lcd off cover close? and i cant see the switch anywhere . so what do u recomend .. changing the hole screen ?
     
  11. Tmagic650

    Tmagic650 TS Ambassador Posts: 21,061   +169

    When you close the laptop cover, there is a very small switch that turns off the LCD display. It is on the motherboard or on a small circuit board near one of the top cover hinges... I have never had a laptop do what you describe here exactly. Because you can see a faint image, this indicates that the backlight is turned off. It is easier to replace the whole LCD Panel than it is to replace just the backlight
     
     
  12. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    £42 for a screen then wondering if i buy the new screen weather it will still do it < meaning could it be this switch coz does seem funny how screen comes on fully when i touch the lcd cable near the bit where it plugs in under keyboard
     
  13. Tmagic650

    Tmagic650 TS Ambassador Posts: 21,061   +169

    You know, the video cable connector on the motherboard could be damaged. This would mean that the LCD Panel and cable are all okay... but a new replacement motherboard would be needed :(
     
  14. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    how could that be tested mate
     
  15. Tmagic650

    Tmagic650 TS Ambassador Posts: 21,061   +169

    You have replaced the inverter and video cable, and nothing has changed the fact that you can push on the cable and get a "normal" display. You could try connecting an external monitor
     
  16. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    yea external monitor works fine but cant keep it like tht as use it at work and when out sometimes
     
  17. Tmagic650

    Tmagic650 TS Ambassador Posts: 21,061   +169

    Well, you just solved this... I would bet that the LCD display's cable connection on the motherboard is damaged... The LCD panel, backlight, inverter and video cable are good
     
  18. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    so your thinking it needs new mb
     
  19. Tmagic650

    Tmagic650 TS Ambassador Posts: 21,061   +169

    Yes, when you press on the LCD cable you could be putting pressure on the motherboards LCD video connector. Sorry to say that it is the motherboard
     
  20. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    i touch the cable literally with the edge of my finger nail so gently . on the actual cable just by hinge not on the actual plug part ?
     
  21. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    also m8 when i touched round the side of the actual lcd screen on the silver bit it came on once .. could it be a magnetic strip as i think thats what its got instead of a lid switch
     
  22. Tmagic650

    Tmagic650 TS Ambassador Posts: 21,061   +169

    Is there a tiny switch near where you press the cable with your fingernail? You changed that cable, right? What happens when you lift the cable a bit?
     
  23. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    na no switch anywhere that i can see i heard this model has a magnetic strip as the lid close thing .. and i gently touch the cable just inbetween the connection to mb and connection to inverter and screen comes on
     
  24. Tmagic650

    Tmagic650 TS Ambassador Posts: 21,061   +169

    I guess that could be the trouble. So are we back to replacing the LCD panel?
     
  25. terry5880

    terry5880 TS Enthusiast Topic Starter Posts: 527

    yea but really dont wanna pay for new screen then it not that as cost me £20 odd already getting lcd cable and an inverter
     


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