Paper printer as different from common office laser printer, in fact, has been widely used in many occasions, such as shopping malls supermarkets to print receipts, invoices, and the print the VAT invoice for the company's financial printer, etc. , there are a lot of USES: such as the traffic police at the scene of a ticket with portable paper printers, financial check printer. What needs to be checked before use paper printer? 1, check whether the printer is in a state of online. In most OnLine button next to have a counter on the printer OnLine lamp, under normal circumstances the OnLine lamp should be in a normally on state. If the light is not bright or in a blink state, then online is not normal, check the printer power on, the printer power switch is on, the printer cable is properly connected, etc. If online indicator light is normal, turn off the printer, and then opened, the test page prints out look is normal. 2, check if the printer has been set to the default printer. Click start/set/printer, check the current use of the printer icon on whether there is a small black hook, and then set the printer as the default printer. If the printer window does not use the printer, click add printer icon, and then according to the prompt for installation. 3, check whether the current printer is set to print. Method is to use the printer window, right-click the printer icon in the drop-down menu to check whether there is a small hook suspension on the print options, if selected to suspend print please cancel this option. 4, you type some text in the notepad, and then click on the file menu to print. DYJ123 if can print test documents, the use of print program has a problem, focusing on the WPS, whether to choose the correct Word or other applications printer, if it is print documents generated by the application, please check the application generated printing is correct. 5, check the computer's hard drive the remaining space is too small. If hard drive space available below 10 MB cannot print, check method is using right click on the install Windows on my computer hard drive icon, select properties, in the general TAB check disk space, if a hard disk space left less than 10 MB, you must empty the recycle bin to delete temporary files on the hard disk, outdated or no longer use the files, to release more space. 6, check whether the printer driver is appropriate and the print configuration is correct. In the printer properties window details TAB, check the following content: in the print to the following port selection box, check the printer port Settings are correct, the most commonly used for LPT1 port ( The printer port) , but some printer but requires the use of other port; If you can't print large files, should review the all the timeout value of timeouts columns, this option is only effective for directly connected to the computer printer, when using the network printer is invalid. 7, check the computer's BIOS Settings in the printer port is open. Printers use port should be set to Enable the BIOS, some printer doesn't support ECP type print port signal, print port should be set to Normal, ECP + EPP mode. 8, check whether there is a virus in the computer, using antivirus software antivirus if necessary. 9, check whether the printer driver is damaged. Available right click the printer icon, select delete, and then double-click add printer, reinstall the printer driver. 10, printer into carton paper or paperboard, printer ink cartridges, ribbons, or the validity of carbon powder compact, such as null and void and will not be printed.