Having problems with your HP Compaq 6735s Notebook ?

No display at startup but showing all lights

\015 I switched on the laptop and when start up it shows me all the light but it won't just start up and the screen will be blank... and the DVD light will be blinking continuously\015

Answers :

First we need to test if the problem should be the LCD screen.\015\012The easiest and most foolproof method for testing your lcd screen is to\015\012hook up the laptop to an external monitor. If the video output on\015\012the external monitor looks fine, this means that the problem is with\015\012the video connector, with your LCD panel itself, or with the circuitry\015\012that turns on the LCD.

Second we need to disassemble the laptop and find the video connector
on the system board (if the video is integrated\015\012on the motherboard) or on the video card that is attached to the\015\012motherboard. Try re-connecting the cables. You may as well locate the\015\012display connector on the back of the end LCD panel. Re-seat that one\015\012too. This way you can be sure that the problem is not related to\015\012connections.

Every now and then the switch located on the\015\012system board that turns the back light of the LCD on and off can become\015\012stuck. If this is the problem then your LCD never powers on. There's a\015\012little switch that detects whether the screen of your notebook is open\015\012or closed. That's the one we're talking about. Try to push it down and\015\012hope it gets unstuck.

Disassembling the laptop to unstick this switch\015\012is an option, but sometimes you can get away with not taking it apart.\015\012Try lightly hitting that plastic switch. But wait, this isn't the only\015\012possible cause, unfortunately. Re-seat the other connectors and cables\015\012that are present around the LCD panel and the video on board (including\015\012the inverter)
Repair Help & Product Troubleshooting for HP Compaq 6735s Notebook

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