Sony DVP-CX777ES Shorted 5V Line - Won't Turn On

[PharoahRamses]

Hey everybody, i'm a new poster.
Recently I managed to acquire a Sony DVP-CX777ES 400 DVD Changer. The device worked completely fine after an initial repair of some simple belts inside the machine. Long story short I used a keyboard with LEDS (which seem to have drawn too much power innapropirately) with a PS/2 Adapter to plug into the front Keyboard Input on the front of the machine. This caused the device to shut off instantly and no longer turn on. Upon opening the shell nothing seemed to be blown, burnt or swollen. I used AI to help assist in a DIY repair that had me replace a part called an MIP2E5DMY. Which didn't work even with my proper soldering technique. After replacing this part it caused the main fuse on the PSU to blow. AI then told me that it was on backwards and had me flip it around, same thing, fuse blew. You'll be able to see the incorrectly placed part and also a missing fuse, pay no mind to those in my image of the PSU below. (Im gonna flip it back around and solder it properly). Also note that the fuse only began to blow after I changed the part, I don't know what this means.

The only thing I am fairly certain of is that there's a short on the 5V line. I did a test while the power supply was plugged in and nothing was coming through the 5V Line on the PSU.

I'm at a loss and i'd like to restore the device back to normal since buying a donor machine is at minimum $200.
Any help is appreciated, I can elaborate more on what happened if needed. Thanks.

 

[Delta Prime]

Do you have a multimeter? Do you know how to use one? Do you know how to read schematics?
Sorry to leave you like this, but I have to attend class. This is the best I can do for you,others here will assist you ; stay away from artificial intelligence if you do not know what you are doing cause AI just made It worse, below is a electronic schematic of your power board and component placement. Follow it. It gives you the voltages to measure at various point's.
Later, kiddo good luck to you…

 

[PharoahRamses]

Do you have a multimeter? Do you know how to use one? Do you know how to read schematics?
Sorry to leave you like this, but I have to attend class. This is the best I can do for you,others here will assist you ; stay away from artificial intelligence if you do not know what you are doing cause AI just made It worse, below is a electronic schematic of your power board and component placement. Follow it. It gives you the voltages to measure at various point's.
Later, kiddo good luck to you…
View attachment 69568

View attachment 69569

Yes, I have & can use a multimeter. Thank you so much for the schematics, I will try to diagnose the issue using them.

 

[PharoahRamses]

If it's possible for you or anyone else to directly link the uncompressed images that's be great since the text in those schematic are barely legible

 

[Delta Prime]

Please forgive me the service manual for your device was too large to upload in a PDF file below is the site where you can download the PDF for free,.yourself if you have any other questions, please do not hesitate to ask

https://audiocircuit.dk/downloads/sony/Sony-DVPCX777ES-cd-sm.pdf

And believe it or not I got homework to do a respond in 24 hours to any questions. Thank you for your consideration.

 

[PharoahRamses]

Thanks!!!