Issues when Connected to an Uninterruptible Power Supply/Power Strip/Surge Protector
Plug the printer directly into a wall outlet to test. The surge protector or UPS may not be allowing sufficient voltage through to the printer.
During the printing process, the level of current passing through the UPS, surge protector, or power strip fluctuates slightly, causing an inadequate supply of power to the printer. The following are common symptoms:
- High pitched squealing, beeping sounds, or alarms (UPS)NOTE: Noise over the phone line can also cause high-pitched squeals and beeping sounds.
- Inexplicable or false error messages
- Printer will not "wake up" from sleep mode
- Printer appears to be DOA
- Incorrect printout
- Slower than normal printing
- The printer control panel display is blank or shows garbled characters
- Accessories, such as attached copier/scanners, do not function properly
- Monitor loses power or shuts off
- Computer reboots when job is printing
- Job only prints half way, causing a paper jam
If it is necessary for the product to be connected to the above-mentioned devices, consider the following items:
- There are many UPS configurations and load conditions that can affect proper printer operation. Depending on these configurations or load conditions, printer functionality cannot be predicted.
- No damage to current HP LaserJet products will occur, but, depending on their particular UPS configuration, the printer may or may not operate properly.
- Printing while on a UPS battery backup is not recommended because of the large power requirements of HP LaserJet products.
- If the HP LaserJet printer is not operating properly and power line conditions are suspected, try a different circuit (a different wall plug located away from the current one), or try removing it from the UPS.