I have no sound on my PDP 4300 - Pioneer PDP-4350HD 43 in. Plasma Television

Look to see PIP or picture in picture is not engaged as it may be doing this.

Try it on headphone. Try changing the input to some other device that works. If it does not work even then, this may need attention by a qualified service technician.

Try it on headphone. Try using another input device that works. If it does not work even then, this may need attention by a qualified service technician.

Perhaps this is what you need:

Pioneer PDP 4300 Service Manual

This covers many similar models:
Pioneer PDP 433CMX Quick Reference Parts Lists

Dave

here is the manual, it's a PDF you will have to download it, then you can print it off

http://tinyurl.com/6kjddxa

it isn't specifically for the PDP-4300 but the instructions are identical

hope this helps
Elliott M

OK Its your power supply and it can be fixd for free due to a recall.
PLEASE READ BELOW what I found out.
Here's the whole notice:

Important: Free Power Supply Replacement for Certain Pioneer Plasmas

Pioneer is continuing to offer a free, in-home power supply replacement for certain of its second and third generation plasma models listed below for consumers who experience a problem with the original power supply. If a consumer model is not listed below, no power supply replacement is needed and no further action needs to be taken.

If you own or use a plasma listed below, please call our toll free hotline at 1-800-421-1404 to arrange a time to have your plasma's power supply upgraded in your home at no charge.

Consumer Plasma Models (12 listed):

PDP-505HD
PDP-503PU
PDP-5030HD
PDP-5031HD
PDP-433PU
PDP-4300
PDP-4310
PDP-4330HD
PRO-800HD
PRO-800HDI
PRO-1000HD
PRO-1000HDI
The issue with the power supply in the plasmas listed above does not pose any health or safety risk. Pioneer has received reports that the power supply in the affected models may fail. In some cases, a loud popping sound can be heard when a power supply fails. After the power supply fails, the plasma is no longer operable.

We apologize for any inconvenience, and we thank you for your cooperation.

That depends on what source your talking about.

Cable call you cable provider and ask them for a HDTV box

Satalite you should already have one if not ask them.

OTA =over the air you need a digital tuner with a nice antenna I suspect this has a digital tuner inside so all you need is a good antenna.

DVD= hook the DVD up with the red,green,blue cables called SCART connections..

Blueray= Will bring you high def.. with its connections.

So your question is vague and can be answered in so many ways.. Rate me please

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

Here is a solution from the Pioneer web site:

http://www.pioneerelectronics.com/PUSA/Support/Important%3A+Updated+Information+Regarding+Free+Power+Supply+Replacement+for+Certain+Pioneer+Plasmas
Important: Updated Information Regarding Free Power Supply Replacement for Certain Pioneer Plasmas Pioneer is continuing to offer a free, in-home/office power supply replacement for certain of its second and third generation plasma models listed below for customers who experience a problem with the original power supply. If a model is not listed below, no power supply replacement is needed and no further action needs to be taken.
If you own or use a plasma listed below, please call our toll free hotline at 1-800-421-1404 to arrange a time to have your plasma's power supply upgraded at your residence or office at no charge.
Plasma Models (15 listed):

• PDP-505HD
• PDP-503PU
• PDP-5030HD
• PDP-5031HD
• PDP-433PU
• PDP-4300
• PDP-4310
• PDP-4330HD
• PRO-800HD
• PRO-800HDI
• PRO-1000HD
• PRO-1000HDI
• PDP-433CMX
• PDP-502MX
• PDP-503CMX

The issue with the power supply in the plasmas listed above does not pose any health or safety risk. Pioneer has received reports that the power supply in the affected models may fail. In some cases, a loud popping sound can be heard when a power supply fails. After the power supply fails, the plasma is no longer operable.

Anyone with questions can call Pioneer's toll free hotline at 800-421-1404.
We apologize for any inconvenience.

The affected models of consumer plasmas are listed below. Anyone who owns or uses one of these models may contact Pioneer through its toll free hotline at 800-421-1404 to arrange for the free, in-home upgrade. If a consumer model is not listed below, no power supply replacement is needed and no further action needs to be taken. If consumers are not sure if their plasma is affected, they should call the toll free hotline for confirmation.
Consumer Plasma Models (13 listed): PDP-505HD PDP-4330HD PDP-503PU PDP-4300 PDP-5030HD PDP-4304 PDP-5031HD PDP-4310 PRO-1000HD PRO-800HD PRO-1000HDI PRO-800HDI PDP-433PU

Try turning the power switch to off and unplugging the television, then plug it in and turn it back on. I have had this same problem and this seemed to work for me.