Having problems with your Philips 190B6CB/27 19" LCD ?

Volume control is constantly on

\015 The volume control on the screen only allows me to change input and will stay at a constant 0 and wont let me adjust the volume it just keeps changing inputs instead pls help!!!\015

Answers :

It may be a malfunctioning circuit board controlling the buttons on the front. If it's under warranty ship it back to Philips; if not markgladding on this site sent me the following advice. Standard disclaimers apply and any questions or comments should go to him.
-------------------------2nd hand advice begins-----------------------------

\015\012If you open your monitor you will find a small circuit board with a row\015\012of microswitches mounted on it. This is the circuit that's causing the\015\012problem.
\015\012
\015\012To open your monitor you will need to remove the stand (one plastic\015\012cover that unclips by hand and 4 screws that can be removed with a\015\012philips screwdriver). This will then reveal two additional countersunk\015\012screws that need to be removed.
\015\012
\015\012You can now remove the front cover. There are 4 clips at the base of\015\012the cover that can be removed by hand. You then need to pry the cover\015\012off, starting at the corner next to the power button. This is really\015\012quite stiff and you need to use a reasonable amount of force. Don't\015\012worry about the loud cracking sound as each clip along the side\015\012releases.
\015\012
\015\012Once the cover is removed you will see the circuit board with the microswitches staring you in the face.
\015\012
\015\012This board needs to be replaced but if you want to fix the problem immediately here is what I did.
\015\012
\015\012Disclaimer - Proceed at your own risk from here on in.
\015\012
\015\012Plug your monitor back into the power and reconnect to your PC. Make sure it's on and still showing the same problem.
\015\012
\015\012The circuit board unclips and there is a 7 pin connector that also can\015\012be unclipped. Remove the board and undo the connector. You don't need\015\012to switch off the power.
\015\012
\015\012After the board has been removed for a few seconds, the on screen display that was permanently visible should disappear.
\015\012
\015\012Now I temporarily disabled the malfunctioning button by bending the\015\012associated pin on the connector 90 degrees and then reattaching the\015\012connector.
\015\012
\015\012How do you know which pin is associated with which button. Trial and\015\012error. Simply bend down a pin, and reattach the connector. If the\015\012problem persists, unplug and try the next pin.
\015\012
\015\012When you've found the correct pin, straighten the others and reattach the connector.
\015\012
\015\012Clip the circuit board back in, making sure the connecting cable is clear and doesn't get pinched.
\015\012
\015\012Reassemble your monitor and you're good to go.
\015\012
\015\012The next step is to order a new circuit board from Philips. These\015\012should be really cheap (I hope) and you now know how to fit it yourself.
Repair Help & Product Troubleshooting for Philips 190B6CB/27 19" LCD

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