HELP Dreamcast Black Screen But Sound is OK

[KeyserSoze]

Hi, first of all my english is not so good, i bought dreamcast today and seller said that working well unit, but after i check unit there is problem about picture, i tested with lcd ( as you see the video ) and 2 crt tv, always give me the sound but no picture, only 1 crt tv black ghosting screen(dreamcast logo visible for a second everthing black ) but sound is okey, i hope it can be easy fix...

Have a good day everyone,

https://youtu.be/azsKFJ8f1rg

[KeyserSoze]

Noone know about this issue ?

[runkthepunk]

Hey there,

It could be the cable has been damaged and a pin has bent or a wire inside the cable has fractured but if you are sure the cable is not at fault then you could try the following.

I have had this a few times and generally one of two things tends to fix it but both involve unscrewing the machine:

1. removing the internal power unit and cleaning the connection pins

I am not sure why but sometimes dirt grime or light surface corrosion seems to stop the machine receiving the correct power and I lose the picture. (please be careful doing this as it is obviously a mains power supply so don't do this if you are not confident!)

2. This is more of a long shot but the GDROM drive may have jiggled loose especially if it has been in transit and does not have screws holding it down.

I tend to have the black screen problem on my machine with a GDEMU board as it is not as secure as the GDROM drives and if I reseat the GDEMU board it can also fix the picture.

These are just my experiences and maybe someone else might have an idea but thats what i usually do.

Hope you solve it