Dvd tray will not open

Hold down the play button, it will take a bit but it turns of the child lock

If the Sony DVP-NS77H DVD player displays "TRAY LOCKED" and you can't eject a disc or open the tray, try the following - First turn the unit off. Then, while holding down the eject, play and stop buttons simultaneously (on the front of the DVD player), turn the unit on with the '/O button (also on the front of the player). This released the locked tray for me.

Hello ,
The 5.1 connections on the back of DVD player are for either <surround system amplifier< or
<5,1 featured Receivers..<
You need to amplify the signal coming from DVD player output plugs..
Thus,those are not for Speaker output.
If and When you connect your DVD player to a receiver ,you will get full sound...
I hope it helps to sort out your problem..
Thanks for rating me..Regards.

Codes for-
Sony DVP-NS300, Sony DVP-NS305, Sony DVP-NS400D, Sony DVP-NS700, Sony DVP-S330, Sony DVP-S335, Sony DVP-S360, Sony DVP-S336, Sony DVP-S525D, Sony DVP-S530D, Sony DVP-S535D, Sony DVP-S536D, Sony DVP-S725D, Sony DVP-S735D
Turn on the unit with the remote controller, Wait until "no disc" appears in the unit's display. Press the keys: PAUSE, 3, 1, 4, 1, 5, 9. And "CODE" will appear in the display. Press the number key that corresponds to the disc zone you want to play within the next 5 seconds:0: All regions / 1: Region#1 / 2: R#2/... and so on. Then, within 5 seconds, press: PAUSE, POWER... and voilà. If you don't have good results, disconnect the equipment and repeat.
Or
Put your player in standby mode and then enter: [[0] [ENTER] Default Default region code [1] [ENTER] or [UP] [ENTER] Region 1 [2] [ENTER] or [RIGHT] [ENTER] Region 2 [3] [ENTER] or [DOWN] [ENTER] Region 3 [4] [ENTER] or [LEFT] [ENTER] Region 4 [5] [ENTER] or [TITLE] [ENTER] Region 5 [6] [ENTER] or [DVDMENU] [ENTER] Region 6 [7] [ENTER] or [RETURN] [ENTER] Region 7 [8] [ENTER] or [DISPLAY] [ENTER] Region 8
Or
Put player into standby modes by pressing power button on remote control. Then press Title button. Press Clear button. Press Power button.
Yours is not listed but these may be worth a go.
or try http://www.haldigital.com/hp/dvd.htm

sony dvp sr320 dvd player lockek how to unlock?

Here is the manual. It shows the hookupson the back.

http://ec1.images-amazon.com/media/i3d/01/A/man-migrate/MANUAL000023978.pdf

Hello,
This DVD player unfortunately does not support most of the Copied DVD /CDs.
it works stemless with only genuine / original CD and DVDs..
If your DVD or CD originally recorded by manufacturers but still can not read ,
than I recommend you to obtain and apply it to clean your laser eye of the DVD player.

The second problem is related with factory locked multizone feature..
on the rear of the player will be a region code plate with a picture of a globe and a
number next to it.If you DVD disc does not have the same ZONE number ,it wont work.
But in order to convert your DVD to a multizone you need to make some additional adjustment.
Hope it will solve your problem.otherwise ask me to give you more on unlocking multizone feature.
Please remember to vote me too..
Regards

Compatible disc formats: DVD, CD, CDR, CDRW, Video CD

try this:
Multi-Region: 
• Turn On the unit with the remote controller 
• Wait until "no disc" appears in the unit's display 
• Press Pause, 3, 1, 4, 1, 5, 9 
• The word "CODE" should appear in the display 
• Within five seconds, press the key that corresponds to the zone you want i.e. 0 for region free, 1 for region 1, 2 for region 2 and so on 
• Again, within 5 seconds, press Pause and Power
hope it helps!

Has it recently been zapped by lightning? Ive never heard of this happening but i can tell you its not a problem you can fix. I suggest getting your money back or exchanging it for a new one.