A few weeks ago, my 14 year old Samsung printer went on the fritz, but doing some investigations, I found someone describing the exact symptoms. The fellow's problem was a couple of bad capacitors in the power supply. So, I pull the back off the printer and sure enough, one of the caps is bulging up.
I hopped on Ebay and ordered a package of each (cheaper to buy 6 than to buy ONE!) and in a couple of days, the package arrives. DOH! I ordered 16v 1500uF, and got 6.3V 1500uF instead. It took a week for the vendor to even respond and in the meantime, I just ordered some from another vendor on Amazon, along with a webcam for a friend who's camera in her laptop had died. The camera arrived in 2 days, the caps took a week! They got there last Wednesday, but I was tied up for the next few days.
I finally got to dig into the PS, and got the capacitors replaced. Put everything back together, gleefully hit the power switch, and ....... was greeted with a red error light, and the motor gave a quick chug, then silence. Ok, take it all apart again and make sure that the solder joints are right. Everything looks perfect. Plug it back up and .... red light... chug.
My first thought it CRAP... time to buy a new printer. But first just check it one more time. Paper... check. Cable onnected... check. Toner... OOPS! No toner cartridge. I went back to the work desk and grabbed the toner, shoved it in and PRESTO. All the lights go green and I hear the gentle whirring of the motor. I fired up Notepad and sent a few lines of text to the printer which came out perfectly.
Sometimes it's the simplest things. Had I not had to wait 3 weeks to fix this thing, I wouldn't have moved the toner cartridge out of the way in the first place. But, in the end, everything is running, for a grand total of $11 in parts. I've got enough caps to repair it 5 more times. Hopefully that will last me until I'm 80!