LCD monitor display not working

The problem you have is with the backlight lamp, which is not turning on. When this happens only because lamp is faulty, Acer LCDs have a security switch that will not turn the screen on at all and will return a blinking light on power on led , as diagnostic feedback.
If you have a dim light it sometimes means that the bulb is still ok, but is not working. This often happens because of a faulty capacitor on inverter, which is powering the lamp.
Although the above symptoms are typical of a faulty inverter, a faulty power supply, lamp, or A/D board can produce the same symptoms.
It's also possible that an inverter could have been damaged by a faulty lamp. If faulty lamp is not replaced before refitting the repaired inverter, in time, the inverter will fail again.

Best thing to do is taking your lcd to a local TV repair or computer repair that works with lcd (ensure they work proficiently on lcds , some of them doesn't), to test if it is the lamp or a faulty component on board. If possible find a shop giving you some warranty time, as, if there is more than one problem the LCD can fail again in few days.

Regards