SONY lcd mornitor, power seens ok. video signal switch off for no reason - Electronic Circuits Projects Diagrams Free

togtoo · 17th June 2009, 12:04 PM

picture will just disappear after running sometime.

If switch off/on, sometime the picture can back.
Or off a half hour, it will back again....

seens video control/switch wrong?

any body know this problem from sony lcd mornitor?

DrDave · 17th June 2009, 02:18 PM

If it's one of the older LCD monitors with an external power supply you might want to open up the power supply and replace the larger value capacitors. I had this same problem and this cured it.Good luck

togtoo · 18th June 2009, 09:53 PM

ok...I tried to parallel a knowing good cap and
saw improvement! So, it is right way to go.

I am here also wonderring about: what if I simply
parallel several ceramic 4.7uF to solve ERS problem?
Keeping what it has..

**Nigel Goodwin** · 18th June 2009, 10:12 PM

Quote:

Originally Posted by togtoo

ok...I tried to parallel a knowing good cap and
saw improvement! So, it is right way to go.

I am here also wonderring about: what if I simply
parallel several ceramic 4.7uF to solve ERS problem?
Keeping what it has..

Remove the faulty electrolytic, and replace with a 105 degree low-ESR electrolytic of the same value, and equal (or higher) voltage.

You're not going to be able to fit enough ceramic capacitors in the space available, and they probably don't have a very low ESR anyway.

sheldonstv · 18th June 2009, 10:44 PM

u will see the faulty electrolytic- it may have a split case or be leaking and there may be more than one to replace-as nigel said replacements need to be 105 degree hi temp types and be the correct voltage rating as well...........

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar
Title	Starter	Forum	Replies	Latest
bypass sony amp switch	stevo1173	Repairing Consumer Electronics	0	25th April 2009 10:56 AM
Video signal processing	jaimegmr	Electronic Projects Design/Ideas/Reviews	2	24th October 2008 10:22 PM
RGB video signal +Sync signal	m_ghaff	General Electronics Chat	1	14th May 2006 07:18 AM
Video Signal	narco	General Electronics Chat	2	23rd November 2004 03:08 PM
Sony CCD-V801 Video Camera	Dex	Datasheet/Parts Requests	0	31st December 2002 06:22 PM

17th June 2009, 12:04 PM	#1
togtoo	SONY lcd mornitor, power seens ok. video signal switch off for no reason picture will just disappear after running sometime. If switch off/on, sometime the picture can back. Or off a half hour, it will back again.... seens video control/switch wrong? any body know this problem from sony lcd mornitor? Last edited by togtoo; 17th June 2009 at 12:08 PM.

17th June 2009, 02:18 PM	#2
DrDave	Sony LCD Monitor If it's one of the older LCD monitors with an external power supply you might want to open up the power supply and replace the larger value capacitors. I had this same problem and this cured it.Good luck

18th June 2009, 09:53 PM	#3
togtoo	ok...I tried to parallel a knowing good cap and saw improvement! So, it is right way to go. I am here also wonderring about: what if I simply parallel several ceramic 4.7uF to solve ERS problem? Keeping what it has..

18th June 2009, 10:44 PM	#5
sheldonstv	u will see the faulty electrolytic- it may have a split case or be leaking and there may be more than one to replace-as nigel said replacements need to be 105 degree hi temp types and be the correct voltage rating as well........... __________________ all "txt speak" has been removed from this post for the benefit of all other forum members who may get confused!!!