Hello, I'd like to begin with saying that I am no expert in electronics, I just like to tinker with things when I get the chance.
This might also not be the correct sub-forum for my problem, I'm brand new here...

My problem goes like this:
I recently found some DVDs that I wanted to play, but my current PC did not have a DVD player, though my old one did. After breaking apart my older PC that I haven't used or connected to a power socket for a good 3 years now I intended on connecting both my DVD player and some older solid state drives, but there were really no ports I could connect to my newer power supply or motherboard that would connect to those electronics, so I had the idea of connecting a socket from my old power supply that's completely independent to the new one as it fits, while also connecting the other sockets that do fit from the old power supply to said electronics. As for those, they each need 2 cables connected to work, 1 is connected straight to the motherboard of the currently used PC and the other to the old unpowered power supply circuit. Will it hold out as a circuit if I use that method or will it fry all components in my system? I've attached some images for reference, the black and yellow cable on the first image that goes from the top of the new power supply is my connection point for the 2.
For some more context, I've tried to ask before in a different forum about my issue, but was turned away after they've told me I should not be messing with power supplies without a degree in electronic engineering. If you believe that the solution to my issue would require me opening my newer power supply or doing some electronics work that needs specialist tools that are for professionals then I'll dismiss the idea entirely. I thank you for your time taken reading this.

 

Welcome to AAC!

There are two cables connected to the DVD player. One cable is for power and the other for data and control (unless it is a USB cable). The simple and permanent solution is to build or buy a power cable adapter that splits the power off from the PC power supply.

If you want to use an external power supply, check that the ground connection (black wire) is continuous with the ground on the PC. As it is, the only way the grounds would be continuous is via both power cables plugged into a grounded wall outlet.

(The data cable would have its own ground connection that connects signal ground between the DVD and the PC.)

 

Welcome to AAC!

There are two cables connected to the DVD player. One cable is for power and the other for data and control (unless it is a USB cable). The simple and permanent solution is to build or buy a power cable adapter that splits the power off from the PC power supply.

If you want to use an external power supply, check that the ground connection (black wire) is continuous with the ground on the PC. As it is, the only way the grounds would be continuous is via the both power cables plugged into a grounded wall outlet.

(The data cable would have its own ground connection that connects signal ground between the DVD and the PC.)

Hello Mr. Chips
Thank you for the response and warm welcome.

I believe that the data cable is already connected to the main motherboard I will be using, as it looks to be the same I used for the solid state drives. I assume the wider outlet is for power and not data transfer.

As for the black cable(which I assume is the one connected to the DVD player), it's connected straight to what I think is a power splitter.

Actually, forget everything I've said prior. I think I'm having a slow realization myself, if all cables I've been able to connect to the main machine without the help of the external power supply circuit are for power, how in the hell would all data go for both the solid state drives and the DVD player through that one circuit that only has one cable connecting it to the main power supply? That one cable will be connected to an outlet that has SATA/PATA written outside of it, so if by some grace it can handle all data going through it I would be in the clear?

My kind regards,
Brummbardier

 

CAUTION!!!!!
Mostly, older DVD and CD devices made for desktop or tower computers had both
the 4-wire power connector Red/black/black/yellow, and the wide ribbon cable DATA connector with a 40 position connector keyed to make it difficult to plug on wrong, but by no means impossible to get wrong. The power supply feeding the motherboard that you motherboard you will connect to should be the one also feeding the DVD transport you are connecting.

 

CAUTION!!!!!
Mostly, older DVD and CD devices made for desktop or tower computers had both
the 4-wire power connector Red/black/black/yellow, and the wide ribbon cable DATA connector with a 40 position connector keyed to make it difficult to plug on wrong, but by no means impossible to get wrong. The power supply feeding the motherboard that you motherboard you will connect to should be the one also feeding the DVD transport you are connecting.

Hello Mr. Bill
Thank you for the quick heads-up.

By now I've mostly connected all cables necessary, although I've not powered on the machine. I will attach a picture on this reply so you can see what the connection looks like and you tell me what you think, I won't power it on unless you say it's in the clear. The SATA cable is connected to the main motherboard and the wide power cable is on the old PSU. Also the DVD player has a manufacturing date of 2017, by my standards it's not that old. I also apologize if the lighting on the picture is not so good.

With kind regards,
Brummbardier

 

OK, the SATA connection is the alternative to the multipin ribbon cable connection. Some SATA connectors include the power connection, others do not. For that you need to read the label on the drive very carefully.

 

OK, the SATA connection is the alternative to the multipin ribbon cable connection. Some SATA connectors include the power connection, others do not. For that you need to read the label on the drive very carefully.

Thank you for your reply Mr. Bill

After a lot of hours thinking what else I could do, I thought of buying a new cable that would handle the same needs and found one that had 3 wide ports on the same type that are exactly what I need. It's not a very expensive cable, but it also saves me the trouble of experimenting with my computer because I thought that using the old circuit as a multi-cable splitter was my last resort.

I thank both you and Mr. Chips for the help you have provided me and the knowledge that I may eventually find use for in the future.

My most heartfelt thanks,
Brummbardier