Question about HP w19 19" LCD Monitor

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Troubleshooting main board.


I'm new to servicing LCDs. I have a HP w19. Walwart is fine (tested under load) 12 and 5 volts leaves the inverter/pw sup board. I've looked for a schemative for the main board (715G1423) and have found nothing. Any assisatance you can offer me in respect troubleshooting the main board would be greatly apreciated. Thank you!

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Three things to look for in service with LCD monitors,
1 bad capacitors
2 Bad transistors for the back light feeds
3 bad ic pulse chips for the Non function circuit
you will not find schematics unless you peruse the patent office records, reverse engineer the circuits and you will have a schematic
when the main chip fails on the vga board its time to buy a new vga video board,
sounds like your board may be suffering a bad IC telling the main chip the power is OK

let me know how it goes.

Posted on Apr 05, 2009

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Hp w19 lcd monitor display go off after a while

Hi There,

Defective capacitors on the power board can cause this problem, you can read tips that I have written here. hopefully can help.


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Those voltages does not sound right, it should have 5v for the logic board and 16~20v for the inverter board for this 20" screen size, but you are getting the white screen which means that the backlight is working, so your measurement may be wrong. The white screen means that the T-CON board is not feeding either the 5v or 12v (depend on the screen makes and model) that will be the first palce to check, the logic board supply this voltage through a switched transistor to turn the T-CON board on or off (off during standby mode).

Basic LCD monitor troubleshooting guide:
Failed TV and Monitors:

I could not locate any free sch for this model yet.

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Is the power led button on while the screen of your monitor goes white and as it been displaying before?

If it as, have you check all connection to see if the VGA and all other connection are intact and well connected? if you have check all this, and yet, it is still white screen you get while the power button is on, it means your picture board is bad.

It means the picture board of your monitor has develop fault and will need to be replaced in other for it to display.

The best thing for you to do is to take your monitor to a local repairer or any service center within your vicinity to help with the replacement of your picture board because the fault is not something you can fix on your own in other not to complicate issues.

Take care.

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Just go to this link:

Type in your PC's service tag and click send them an email or do what I do and use the online chat feature. It is quick and easy. You'll need to give the very log serial number off of the back of the monitor (usually begins with the letters MX, CN, or MC).

However, if it is older than 3 years you may be stuck buying a new display. Luckily there are some great deals now on new LCDs....let me know how it goes.

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Wrong display drivers will get you every time.
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