Question about HP Pavilion F1503 15" LCD Flat Panel Monitor

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Power on but image on screen is very faint. What could the problem be?

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HP monitors are renowned for having the inverters quit working. To repair the inverter you disconnect the power and if a laptop also remove the battery. Remove the plastic bezel (edge plastic around the screen), this can be done by lightly prying the plastic away from the screen, at the bottom of the screen just behind this plastic bezel you will see a small printed circuit board with 1 or 2 screws holding it in place with wires plugged into it, you will need an exact replacement part, the part numbers are printed on the board. Most boards are readily available for around $20 or less on Ebay. Carefully unplug the wires and screws, install the new board, attach wires, replace screw(s), snap bezel back in place making sure no wires get pinched, and you should be good to go. 30 minute fix for a novice.

Posted on Nov 29, 2013

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On acer aspire laptop screen is grey at startup


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Bonnin, Can you see a faint image on the screen? Have you tried to hookup an external monitor?
IF you can see a faint image on the screen, and a normal image on the external monitor, you have a bad power inverter (for the lcd screen) or a bad back light (in the lcd screen).
Take laptop to a shop to have them verify.
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The problem sounds like it could be related to the LCD panel becoming faulty or if your able to test inside the unit with a multimeter, you can measure the voltages from the printed circuit boards, especisly those suppling power to the LCD panel as well as the Logic PCB, A small printed circuit board you will find either attatched to the LCD panel. I hope this helps.
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MONITOR ONLY HAS FAINT IMAGE, COMPUTER WORKS WITH EXTERNAL MONITOR, HAVE REPLACED SCREEN TWICE AND INVERTER BOARD TWICE, NO LUCK--OTHER SUGGESTIONS?


When you have a faint image, it means that the backlights are not turning on, most of the time, its the inverter not supplying power to the lights.
My suggestion is to take a volt meter and test the voltage going to the inverter. I can not tell you what it should be, but you should have voltage more than 5 volts going to it. Its very possible that if you changed the inverter and the screen, that the main board is not supplying enough power.

thanks adi

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when you first power on using lower right (power) button, wait 6 seconds for the intro screen to finish. The upper left (up) button increases screen contrast. Hold this one down for a few seconds and the screen should darken. The middle left (down) button decreases contrast.

If this doesn't work, try turning off by holding the power button.
Hold down upper left AND upper right while turning unit on. This initiates diagnostic mode and contrast is darker by default. Bottom of screen is a button test area which darkens a symbol for each successful button press. Use it to diagnose a button problem. Turn off power and on again to leave diagnostic mode.

I wish you success playing with the Etrex.

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It's all black


If you power it on, take a flashlight and shine it on the lcd at and angle and look real close to see if you can see a faint image. If you can, then your backlight in the screen is not working.
Also, you can attatch an external monitor to it, while its off, then power it on and see if it lights the external monitor. Try that and let me know your results.
If you get a picture ok on the external, and you can see a faint image on the lcd using a flashlight, then it could be the backlight inverter board or the bulb itself inside the lcd went out.
If you don't get any picture at all, using an external monitor and can't see a faint image on the lcd using a flashlight, then I would say there's other problems with the laptop itself. Could be a mainboard problem, power issue, etc..

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