Samsung CLP-610 will only print a couple of pages then stops with

SOURCE: samsung CLP-300 dark prints and smears

For starters remember this is not meant to be a PHOTO Printer, I am guessing the Spearing is because Glossy paper does not hold the toner like Regular paper or at least until it is fused. I am a technitiian and i also own this printer.

SOURCE: wrong clp 510 toner

samsung clp 500 toner cartridge can not use samsung clp 510
bcase clp 500 is without chip and clp 510 chip base cartridge so never u can user.

SOURCE: Samsung CLP-300 poor print quality

black developer on drum worned out,need changing.

SOURCE: HL 2040 Toner LED comes

Hi

Try and reset the Brother printer, Open the front cover of the Brother HL-2040 and leave open while completing the following steps:
1. Open the Front cover
2. Press and hold the GO button
3. Power ON the printer while continuing to hold the GO button
4. Once the 3 LED's are lit, release the GO button
5. Press the GO button 2 times. This will cause the LED's to light solid
6. With the LED's lit solid, press the GO button 5 times
7. Toner Life End will then reset
8. Close the front cover.

Hope this helps... Please post back if you need more information.
Daniel