20 Most Recent Samsung SyncMaster 204B 20.1" LCD Monitor - Page 2 Questions & Answers

Hi Yanss1971,
May i know, what's the power led light status? Red, Green, Orange, Blinking or Off? If you need more info on lcd monitor repair please visit this site as reference: http://fastrepairguide.com/p/lcd-monitor-repair/

kent

Your monitor has a 3 year warranty through Samsung. The issues you are having indicate that your video control board in the monitor is beginning to have issues. You need to get an RMA to have it serviced before the warranty runs out.

The power supply inverter board usually ends up with one or two bad capacitors "sometimes puff at top" causing monitor not to power up.

1. this may be due to cable select and or cable not being secure at connection point
2.check your instruction manual for proper setup for digital signal to the LCD monitor and the to your video source.

How long have you had the monitor. It sounds like a defective backlight. Usually when the circuit driver for the backlight starts to go bad, the monitor will blink. If this is the case, eventually the monitor will not turn on at all.

Replace the screen with a known working one. If it shows display then it is the screen which is broken, if not, then it could be the port on which it is connected.

A full repair guide with dis-assembly and repair instructions is available at:http://www.ccl-la.com/blog/index.php/samsung-204b-lcd-monitor-repair/I hope this helps, if so please rate my solution.BuddyMc

This sounds like a power supply problem, how old is the monitor? If it is not new in the last year and is used regularly it sonds like a faulty capacitor in the power supply. If you are aware of the precautions necessary when handling capacitors and a moderatly competent solderer then you can replace then yourself - a complete set of capacitors usually costs around £3 or $5

Try to replace C110 and C111 in the power supply circuit. These are 820uF caps and are in parallel. I had slow start and a flicker on this same monitor. Replacing the caps fixed it. Good luck, Ryan

FIXED: I took the advice to replace C110 and C111 with 1000uF 35V electrolytics (http://www.radioshack.com/product/index.jsp?productId=2102511). $3.18 and a pretty easy time prying open the case with a medium-small flathead screwdriver, disconnecting a few connectors, 4 silver screws (2 on the left & 2 on the right of the LCD), 2 black screws on the back of the metal case, 3 black and one brass screw on the PC board, and it works like new.

HINT: Be sure to insert your new capacitors correctly (positive and negative sides). The capacitor has + and - sides (the - side was marked on mine). The bottom of the PC board (where you apply solder) has a + marked on the positive side.

For the faint of heart: I am an inexperienced and HORRIBLE solderer and know close to nothing about capacitors, resistors, etc. So, if I can do it you can too!!!

Hello,

This is a common problem with the Samsung 204B units that have been in service for a few years. Parts called capacitors in the power supply start failing and causing the board to not start correctly. The blinking power button is just the power supply restarting over and over. The monitor is easily repairable, you just need to replace the 5 capacitors that have failed. Here is a link to a page that shows how to open the monitor, get to the power supply board and what to replace.

http://www.ccl-la.com/blog/index.php/samsung-204b-lcd-monitor-repair/

I hope this helps, if so please rate my solution.

BuddyMc

Hello,

The 204B monitor have a known issue with power supplies that start failing and you get the "slow to show picture" problem just like you have. The monitor is very easy to repair and the parts are low cost. Here is a link to our repair guide http://www.ccl-la.com/blog/index.php/samsung-204b-lcd-monitor-repair/ If you can solder then you can fix your monitor. If you don't want to repair it contact me and we may be able to buy it from you for parts.

I hope this helps, if so please rate my solution.

BuddyMc
[email protected]

Hello,

The Samsung 204B monitor have a know issue with failing power supplies that cause the exact problem you are having. At first they are a little slow to display a picture and the more you keep using it the longer it takes for the display to come on. The repair is simple if you can solder. Here is a link to a site with additional information on this repair. http://www.ccl-la.com/blog/index.php/samsung-204b-lcd-monitor-repair/ This Samsung 204B monitor is a great unit with a simple to solve issue. No need to trash a good unit.

I hope this helps, if so please rate our solution.

BuddyMc

my Samsung syncmaster b1930 have line red

You will have to check out the rest of the circuits such as the MOSFETS and caps, fuse in the inverter circuits. No bad caps that you can see? Notes: bad caps can look normal,
If you are going to DIY and already try the monitor with another PC, 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/albums/yy352/budm/ Post back what you see inside so we can guide you further and it will help out other people in the future also. Service manuls (may not match your model exactly) http://elektrotanya.com/?q=showresult&megnev=SAMSUNG&megnev2=204&kategoria=monitor&kat2=all

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: 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. Please leave rating if it helps.