LCD monitor makes CRT-like hiss: is that normal ? at DVinfo.net

Steven Nichols · September 23rd, 2006, 12:29 AM

I have a Panasonic LCD BT-LH17000W monitor but I noticed a hi-frequency noise from the back of the unit - kind of like an "electrical hiss". I was just wondering if this was normal for a LCD, since it reminds me of the kind of noise a CRT makes !
Anybody works with that monitor ?

Frank Hool · September 23rd, 2006, 01:26 AM

Probably it's inverter making that noise. It generates high voltage for screen. There is small transformer inside inverter. That could make a noise. In my eyes it is a warranty case. Inverter should be replaced.

Bob Hart · September 23rd, 2006, 06:16 AM

Might be a high frequency noise almost out of your hearing range. CRT tubes warming up on old black and white Philips TV sets used to almost send me insane when I was a kid. ( On reflection, maybe they did. ). If you have children, ask them. They may well hear a clean extremely high pitched whistle.

It may be a fault but it might also be a normal operating state.

Steven Nichols · October 21st, 2006, 10:15 AM

There were a problem with the monitor. I had it changed.

September 23rd, 2006, 12:29 AM	#1
Steven Nichols New Boot Join Date: Sep 2006 Location: Nashville, TN Posts: 10	LCD monitor makes CRT-like hiss: is that normal ? I have a Panasonic LCD BT-LH17000W monitor but I noticed a hi-frequency noise from the back of the unit - kind of like an "electrical hiss". I was just wondering if this was normal for a LCD, since it reminds me of the kind of noise a CRT makes ! Anybody works with that monitor ?

September 23rd, 2006, 01:26 AM	#2
Frank Hool Major Player Join Date: Apr 2006 Location: Barca Spain Posts: 384	Probably it's inverter making that noise. It generates high voltage for screen. There is small transformer inside inverter. That could make a noise. In my eyes it is a warranty case. Inverter should be replaced.

September 23rd, 2006, 06:16 AM	#3
Bob Hart Inner Circle Join Date: Dec 2003 Location: PERTH. W.A. AUSTRALIA. Posts: 4,477	Might be a high frequency noise almost out of your hearing range. CRT tubes warming up on old black and white Philips TV sets used to almost send me insane when I was a kid. ( On reflection, maybe they did. ). If you have children, ask them. They may well hear a clean extremely high pitched whistle. It may be a fault but it might also be a normal operating state.

October 21st, 2006, 10:15 AM	#4
Steven Nichols New Boot Join Date: Sep 2006 Location: Nashville, TN Posts: 10	There were a problem with the monitor. I had it changed.