If you are going to DIY and have proper tools and know safety precaution then please read on: Basic LCD monitor troubleshooting guide: http://en.wikipedia.org/wiki/Capacitor_plague
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed DELL monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
Learn about bad caps: Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
This is battery
related. On top of your unit is a battery pack with three colored led
lights. You can tell what is going on by looking at these. This
information is in your manual or here it is.
GREEN LED: All systems are normal. A solid LED light indicates
the batteries are fully charged. A flashing LED indicates the
batteries are being charged. NOTE: Batteries do not have to be fully
charged to operate the motor unit. YELLOW LED: The motor unit has
lost power and is operating off of the BBU. A solid LED with beep,
sounding approximately every 2 seconds, indicates the motor unit is
activating the door and is operating off of the BBU. A flashing LED
with beep, sounding every 30 seconds, indicates batteries are low.
Once the power is restored the BBU will recharge. This is indicated
by a flashing green LED. RED LED: An error has been detected and the
BBU will automatically shut off. The BBU will attempt to restart by
reconnecting to the batteries. If the error is still present it will
shut itself off again. This process will repeat every 5 minutes or
until the error has been resolved. This is used to prevent further
draining of the batteries. If a red LED remains on when the power is
restored, and is accompanied by a beep sounding every 30 seconds,
please call for service.
This is battery
related. On top of your unit is a battery pack with three colored led
lights. You can tell what is going on by looking at these. This
information is in your manual or here it is.
GREEN LED: All systems are normal. A solid LED light indicates
the batteries are fully charged. A flashing LED indicates the
batteries are being charged. NOTE: Batteries do not have to be fully
charged to operate the motor unit. YELLOW LED: The motor unit has
lost power and is operating off of the BBU. A solid LED with beep,
sounding approximately every 2 seconds, indicates the motor unit is
activating the door and is operating off of the BBU. A flashing LED
with beep, sounding every 30 seconds, indicates batteries are low.
Once the power is restored the BBU will recharge. This is indicated
by a flashing green LED. RED LED: An error has been detected and the
BBU will automatically shut off. The BBU will attempt to restart by
reconnecting to the batteries. If the error is still present it will
shut itself off again. This process will repeat every 5 minutes or
until the error has been resolved. This is used to prevent further
draining of the batteries. If a red LED remains on when the power is
restored, and is accompanied by a beep sounding every 30 seconds,
please call for service.
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