Does the subject want to ask, "What if the Samsung 560 laser printer doesn't warm up sometimes?" ? Check the power supply and connection, and clean the printer.

1. Check the power supply and connection: Make sure that the power supply of Samsung 560 laser printer is turned on and all connections are stable. Do not preheat the printer due to power supply or connection problems. Then these problems are solved, and the printer can be warmed up normally.

2. Clean the printer: There is dust or dirt inside the printer, which will affect the preheating function of the printer. Open the printer housing and clean the inside of the printer with a soft cloth or cotton swab, especially the heating element and laser part.