The sound on this DVD player (GPX PD708B) is no longer working. The only way to get any volume is by plugging headphones in to the AV out slot. Any ideas?

Have you checked out the user manual?
If the manual doesn't help there is service information
on the last page of the manual,email and phone information.

http://audio.manualsonline.com/manuals/mfg/gpx/pd708b.html?p=1

Softwares Or Cmos issue Re-Install your program Go in your System Configuration then Control panel and Add and Remove
Un-install your GPX Software and Re-Intall it If dont work you may have issue with your harware inside your laptop ...Refer to PC Teck

http://www.amazon.com/adapter-charger-PDL805-YG-PDL907-YGPDL907/dp/B001R2664O

There's one for the wall!

http://www.acdapter.com/gpx_dc_car_adapter.html

And theres one for the car!

C14 was leak and resistor R2 burn out, I replace C14 with 0.1 uF and R2 with a chip fuse, sound after that was great at the speakers.
A.S.

You have to buy the $15 video cable from GPX. I tried several differant cables including RCA to S Video as a last resort. They say theirs is propritary and I now believe it!!!

on mine I can plug a set of computer speakers into the a/v out port and have sound you can also plug in some earbuds for portability but cannot adjust the volume, it is at a comfortable listening level though. be sure to use the a/v out and not the earphone jacks.

Looks like several people have this problem. I downloaded a copy of the manual to see if it had any hidden secrets, but no luck (I don't have one of these).

This thing has a couple of modes (DVD or A/V input) that you switch between by pressing and holding the STOP/DVD/AV button in until it switches. Try switching the mode a couple of times. Maybe the thing is expecting external audio.

Other than that there doesn't seem to be any cause other than a defective unit. These things are made in such quantity and at such low cost that there will always be duds. If they are still within the return period where you bought them, then take them back for exchange and test them at the store. If you can't do that, contact GPX at the phone number or website about replacing it.

(I personally don't buy GPX for the simple reason that their stuff has problems sometimes. I went through 3 CD boomboxes once and swore never again for this brand.)

plug in some computer speakers into the A/V out port. you can also plug in some headphones/ earbuds into it but wont be able to adjust volume, it is at a good listening level though. be sure to use the A/V out port and not the earphone jacks. hope this helps

The pin on a regular 3.5mm av to rca is TOO SHORT. If you get the unit from GPX, you'll note it is a bit longer. I found this problem also affected Sony and other portable DVD players - the regular 3.5mm plug is TOO SHORT. I haven't found a source other than GPX for the av cable with the correct length plug. Weird but true.