Screen was working fine until my daughter opened it up all the way flat to the back. Now it is just black all the time. If I shine a light close up to the screen, I can see what is on the screen and actually navigate. Looks like a backlight issue to me. What can I do to fix this?

Check and replace its back-light inverter board. Contact any service technician. Gopakumar Gopalan Google

Dim the lights in the room, turn on the set. Shine a bright flashlight on the screen, do you see a faint picture?

hi,
You have to check the back light of your lcd monitor. All lcd screen have a back light to illuminate the pixels. you can conform is the back light is faulty or not by watching the lcd screen nearby. Watch can you see any image (negative image) on the screen. you have to look very closely. if you see any image on the screen then the back light or the back light inverter is faulty.

You have to check the back light inverter board. Normally in lcd monitors you can see three circuit boards. power supply, mother board, and the inverter board. If available then try to replace the inverter board. There are high voltage transformers in this board. There is a chance for its winding get short. You will not get the transformer in open market. Try for the inverter board .
ok

Test: You might see a pic by shining a bright light against the screen. (Halogen can burn a spot if too close for too long like 15 seconds). If so, you probably have an inverter, backlight tube or coil/driver board problem. Some of these units have a bad ground on the tube driver coil board which can be shimmed and/or tightened. Sometimes a simple car light tester (continuity tester with a 12v bulb) from casing/mount ground to any of the - side of the backlight driver coils will light the screen and reveal if and which tube is non functional. I leave one dome light running in such ground position one of my TVs at all times for regulation and night dimming.

LCD's use a colorful crystal see through display which only visible when light is shining through it. if you have sound and no picture it's always a faulty PSU. Very easy to change out actually.

100% it ur LCD screen inverter two long boards it dead,not getting the pic,but sound.

it isnt my problem

If the screen is black and you have sound then lightly press and shine a strong flashlight against the screen. If you see an image around the edge of the flashlight, an image is being 'displayed'. The problem is probably in the Inverter/CCFT or the power going to the Inverter.

A 19" Philips LCD prefers a setting of 1440X900 if you are too far off this it will turn itself off.
Right click on the desktop, go to settings and set it to 1440X900 and then go to advanced and make sure the refresh rate is set to 60 Hertz. Shining a flashlight on the screen will help you see.

There other thing that might be causing this is the setting on the monitor itself. Press the Menu button on the LCD and adjust the brightness and contrast.

If all else fails, contact Philips. This is a premium brand and it comes witha 4 year warranty.

try to look at your rollers made of black rubber, if they are shining then they need cleaning, if you know how to open the unit to get to all these rollers then you might be able clean them yourself with laquer thinner and a rag, where gloves and turn the rollers into the soaked rag and keep turning tight with lots of elbow grease until all rollers lost that shine.