Question about HP L1720 17 in. Flat Panel LCD Monitor

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Exactly the same problem!

After using the monitor for more than 15-20 min it gets flikering lines.
This has nothing with the display's hardware. I thing it's because of the power supply board in the left, but the problem can't be solved only with change of the capasitors.
Has anybody any idea for this problem!

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4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

bhagyavichar
  • 414 Answers

SOURCE: monitor display problem

though itz very unclear n i don't understand the moral meaning of windows going down..!!..n wat is the link of windows going down with ur monitor..

however, itz probably causing from faulty or defective smps or main/mother board..
if not probably itz causing from the monitor itself..

proceed to verify with the below stated steps, only if u r a professional..

DO IT ONLY IF U R A PROFESSIONAL..
..plz do check the following as in order:..
the Hardware part:..
1) check mains/power supply..the fuse, switch, wiring n associated circuitry..

2) [in case of desktop] thesmps itself may b defective/faulty..check the outputs of smps viz. 0v(black~ground); +12v(yellow); +5v (red, green~ps-on, violet~pg&grey~sb); -12v (blue);-5v(white); +3.3v(orange)..
check the battery n adapter [main power], in case of laptops..
replace with a standby n see..

3) unplug mains supply..pick open/remove the cmos battery..check (above +3v)..resit..

4) open the cpu n see if heat is generated..if not..replace the cpu n see..

5) open the CPU Heat-Sink with fan out of thesocket..put some "Heat Sink Compound" (available in local electronicschip level spare market)between the cpu/processor and the CPU Heat Sink*** fan..resit/fit it tightly in position..

6) on main/motherboard..see with a debug card for mb error..may b short..look fordefective capacitors(espabove1000mfd)/mosfets..go through the mb'ssouth bridge n the circuit lie around atx connector..the crystal clockgenerator (if cpu isn't heating up)..
replace with a standby n see..

7)seeif the ram(s) is loose/faulty..open clean/remove carbon & or oxideformed on the teeth with an eraser n resit it..or replace with a standbyn see..

8)remove/clean dustneatly..dust is non-uniform in nature n may causejam/short circuitry/excess resistance n many more..resulting an increasein heat..

9) if all above fails..just try to service the monitor..open and re-sould all the dry soulderings..itz probably is causing due to ur monitor's internal circuit dry-soulds..esp. at the crt base n around the horizontal output section (hot)..

the Software part:..
1)hv a licensed and UPDATEDantivirus installed (i prefer avg/kaspersky,remember, without updationa full version antivirus is useless)..

2) download, install n run microsoft kb890830..http://www.microsoft.com/downloads/details.aspx?FamilyId=AD724AE0-E72D-4F54-9AB3-75B8EB148356&displaylang=en..

3) download n run Startup Control Panel..http://download.cnet.com/Startup-Control-Panel/3000-2094_4-10039330.html..'removeall the unnecessary startup items from here..(if u can't find whatto remove, post me/us in ur comment with all the items listed in eachn every tabs herein)..

4) remove all unnecessary software from add/remove programs..

5) download, install n run 'Advanced System Care Pro'..http://download.cnet.com/Advanced-SystemCare-Pro/3000-2086_4-10399324.html..

6)disable the following:..
a)'Automatically Restart'right click on my computer->properties->advanced->startupn recovery->(un check on the) Automatically Restart;
b)'Error Reporting'right click onmy computer->properties->advanced->error reporting->disableerror reporting->(uncheck on the) 'but notify me when critical erroroccur'..

7) Increase the size of Virtual Memory, Initial: 1440; Maximum: 2880

if u r not a professional, always better to seek advise from ur system admin/vendor....

Posted on Nov 16, 2009

  • 732 Answers

SOURCE: Have HP PE1230 monitor, I am getting 12.5 VDC from

dlquadt698, possible failure of inverter electronic "ballast" circuit??? Try here if you havent already done so. http://www.lesliewong.us/blog/2005/05/02/hp-pavilion-f1703-flat-panel-display-blackout-solution/ might be of some help. 12fixlouie

Posted on May 20, 2010

budmrtn
  • 11361 Answers

SOURCE: hp monitor L1502 is dead,

Look for bad caps as shown in my pictures here first,
http://s807.photobucket.com/albums/yy352/budm/HP%201502/

Basic LCD monitor troubleshooting guide:

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

Failed TV, Monitors, Caps : http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague
Capacitor kits: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Please post back what you find.

Posted on Nov 01, 2010

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