Please allow me a few moments to review your question again.

http://spares.bigwarehouse.com.au/index.php?cPath=147_205_3382

parts list,

What you are experiencing is when it gets warm it suffles, this can be from many mechanical problems what happens when someone says it works until it warms up is something has worn and worn to a point where a mating part expands when it gets warm losing all clearance and or tolerance, but about anything can be repaired but you will need to understand thermal expansion of metals and what parts to look for that might expand with heat, I could not find a current price on this unit, but cd players can be had for little to nothing anymore, if you want the project to learn I appreciate that, but in a practical approach say just to get it to stop this suffling when warm, is probably not something you want to put a lot of time and money into, it would be impossible to say which exact part[s] is causing this problem I am surprised the parts list looks current as most devices now days UNFORTUNATELY are made to pitch, and buy another one, I hate it but that is the world we live in,

I would not discourage someone from learning it just all depends on your motive and what time and money you want to put into this project and it will be a project alignment of the laser and so many tiny sensitive parts involved you need to understand static protection and wear a static wrist band so you do not damage other parts with static discharge while you work, botXXX XXne yes, if you have some experience and tools in reality, probably not the best project to tackle if just wanting to learn get a bread board and some components and build a circuit, and add a motor, make up whatever, but trying to fix a cd player just no cost effective anymore as sad as that is,

Not right off the top of my head I have a 100 disk player, and I understand I like having all the disks in there and can set it to play in order in the world, if you really like it, run it by a electronic device repair shop, and get an estimate, I hate tossing things too, and understand completely, but I am afraid if you get in there and get something out of line then it gets more expensive to fix, have you looked around on ebay and craigslist there are some reputable sellers that have vintage devices that are hardly used, the alternative is give it a try it is not working now, maybe you find the problem the minute you get the lid off, just trying to be realistic about the chances of a successful repair without prior knowledge, access to ALL the OEM parts you might need, but looking inside carefully should not be a problem I would wear a static strap just to make sure maybe a good cleaning would take care of it, but I promise major parts repair is going to be a problem for you, so why not get an estimate so you know what you are up against?

I have to boot this machine for some reason uverse needs to download something will be right back gonna run and get a cup of coffee while it is booting so leave me any comments or questions you need, I will get them