Monitor power button works poorly\r\nand black type is difficult to see--faded and nearly impossible to read

all modern LCDs have ONE and ONE only native screen size. since you did not tell us the model number we have to tell you maybe you are setting the wrong size. if the monitor has worked before then you are sending it the wrong signal.

There is a possible poor connection of component in your TV or poor solder or that would be the result of Power IC which is already defective...call a technician to fix the poor solder and or replace the IC that cause the problem

Look for bad caps as shown in my pictures first.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX2235W/

If you are going to DIY and have proper tools and know safety precaution then please read on:
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 VIEWSONIC 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.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

It can be 12vdc power supply section with bad cap, that will be the first place to look, or it is the backight inverter circuits, worst case will be the lamp assemblies, but find out first if the caps are good or bad, please note that bad cap may look normal but can have high ESR.
If you are going to DIY and have proper tools and know safety precaution then please read on:
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 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://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Please post back what you find.

Look for bad caps: http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX924/

Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx

If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, 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 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://en.wikipedia.org/wiki/Capacitor_plague

Blinking powerlamp is indicating that the power supply is in shut down/restart due to short circuits, these DELL are known to have failed transistors in the inverter circuits due to poor solder joints. See example of here:
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Replacement bd.: www.lcdrepair.us

morinj_04, "Switch-mode-power-supply" going into partial shutdown mode. Read more of my BLACK screen and BLACK and BLANK screen responses in my profile. You will get the hint as to what to do!!!
12fixlouie

There are 4 c5707/5706 in the inverter transformer driving circuits, the cause of the problem was due to poor solder connection in the bias circuits of the transistors. Make sure to check that after you install the new transistors otherwise you will blowthem up. Common problem with this model. When the circuit drwas too much power from the power supply, it will shut itself off to ptotect itself.

leos343872, Black screen type of failure. Is anything still displayed even though screen is black when you hold flashlight 1 inch from lower left corner near start button??? Possible "switch-mode-power-supply" in shutdown mode. Tech or you will need to evaluate further!! Read more of my advice to other owners with BLACK screen monitor problems in my profile. or louie12fix profile. 12fixlouie

the internal power supply is bad.