HP Laserjet 1200 squeak

[Bsmith_tn]

I have an older HP Laserjet 1200 which has developed a loud squeak when printing.  I have a feeling a roller is the problem because the printing may come out squiggly.  Can anyone advise how to find the squeak?

[Valsimot]

There are several components that can cause loud squealing noise on LJ1200, most common would be toner cartridge and laser. if you have a spear toner cartridge to test the printer that will eliminate a lot.

The laser sounds is a high pitch motor rotating at high speed ( like a whistle), you can hear it when it starts slowly then goes to the maximum and then slows down, toner cartridge sound is the same all the time during printing.