I have a Sony R526DS computer bought in 1999. The power supply unit is making lot of noise. The replacemnet unit fron Sony support costs $147 +shipping. I was wondering whether I could use a cheap generic power supply unit from CompUSA or BestBuy. The unit is mounted to the case back side with three screws. My concern is whether yhe unit will fit inside the case. Thanks in advance.

Take your old unit to compusa or best buy and visually make sure the size and plugs exactly match a replacement. Also make sure the new one is the same wattage or higher. (there should be a sticker on the psu) but you do not need a new psu, you just need a new fan. Since opening a psu is dangerous if you've never done it (though harmless if you have), I don't recommend taking the psu apart. Might as well get a new one.

I once removed the psu case and cleaned the inside of the unit. There was lot of dust. May be I should try cleaning the inside again and see whether the noise goes away. Thanks.

As long as you are careful, replacing the fan in the PSU isn't difficult, but does require cut/solder of the wires as they are usually hardwired in. As long as you completely insulate the joined wires it should be fine. Just give the capacitors a visual inspection while you have it open. If any show signs of swelling/leakage then replace the whole unit. If the PSU ever fails it can put a destructive surge through the rest of your system. Give a man a fish and you feed him for a day. Teach him to fish and you feed him for life.

I would not suggest this. The PSU can take out other hardware and for a 5 year old supply it's probably time to replace it with a brand new unit. I agree with johnoh, take the unit out of the PC and go shopping for a replacement. Anywhere that sells Sony OEM's should be able to help you for less than the price above. I wouldn't guarantee that with Sony however... J. j e r u v y a t y a h o o d o t c o m

Response #1 is the way to go. If you visit two stores without a match, it time to go to Sony or look for a Sony compatible psu online. Skip

this is a tough question. would the 147+ be better spent on a new system? if you really love this machine then spend the money and keep it. (although other components are deteriorating as we speak so pleasantly) note capacitors can hold a killing amount of charge. opening a power supply unit is dangeous is correct.