When we play DVDs, the picture is very dark and is

this guy tells you all you want to know about them
Why the Cyberhome CH DVD 300 DVD Player is AWESOME

hi,
Its only a DVD player. it can play DVDs and CDs. There is no other input in this DVD which will convert the analoge to digital. You can't use this DVD player to make your tv a digital one. yha its true that you can watch DVDs and CDs through you tv.
OK

they are stop, eject, play ,ff, rr, pause, and power.

This guy has pictures and instructions for a major operation on a cyberhome player.
http://backandforthblog.com/?p=11

change the motor disc spindle

Chech the laser lens rails maybe got dirt clean it take off the grease they got.

Reset you player by doing the following:
With the player on, hooked properly to your television, and on the correct station:
Open the tray
Close the tray (with no DVD inserted)
Hold the stop button down for a full 5 seconds
The CyberHome screen should appear. You should be able to play your dvd's now.

Laser got weak. buy a new one

Goto the following site: http://www.drx9000repair.netfirms.com/#Cyberhome%20CH%20300 You more than likely have a bad power supply. The caps in the output circuit are pretty crappy and are well known for failure. Good luck! Art

Go out and buy you another brand DVD player.