Power switch on Samsung SyncMaster 740Nw 17... lcd moniter is not showing display, power led is beligging fast sometime, after sometime power led is beligging slow,power switch led is not working

pls chek 1000/25cap ,and inverter fuse, and 5402 ics

have you been check for a bulging capacitors at the power supply board.

Look for bad caps with bulging/leaking tops, you should replace them in a set.
http://lcdalternatives.auctivacommerce.com/Repair-Kit-Samsung-Sync-740N-LCD-Monitor-Capacitors-P1660401.aspx

Very common problem with all LCD monitors as you can see here:
http://s807.photobucket.com/albums/yy352/budm/

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Desktop or laptop computer

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connections and are not faulty or just replace them they might be faulty

make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electical extensions

even something as small as an electrical fan and its lead can cause you problems or just replace them they could be faulty a computer needs all electrical power and data to continue through every working device and to have an end so any faulty leads will end up with a computer error

make sure your graphics card is securely seated with no dust built up or in the socket

if you remove your graphics check the socket to make sure its dust free

restart your computer then reinstall it this should activate found new hardware wizard

hope this helps you

replace bad capacitor on power board (like 820/25v or 1000/2v)

this problem can occur cause of two cases 1 problem with LCD panel (replacement can solve) 2 power failure in side moniter (repairing moniter can solve)
thanx PLZ vote

If you are DIY'er go to Display in Control Panel and reset to default, this might work. If not, try a RESTORE POINT roughly before condition started.

Have you kept up with your computer MOT's

ie Defragging?

you can serach it in this site(google.com)
i hope i can help you

1. cpu problem. why because of there is no signal output from cpu to monitor. the led blinking means there is no vertical, horizontal signals from cpu to monitor.

2. your monitor connected to another system.

3. neck board dry points.

4. cheak the display cable. 13&14 pins are horizontal, vertical signals.1, 2, 3 pins , R G B , 6 ,7, 8 pins R G B ground ( coaxiler cable used , meshed wire is ground )

Seems either aproblem with Invertor board or Front panel switches are leaky.
Samir