How do i make my x543 wireless

Its very easy to setup dell printer by own.You just need to follow some simple steps.Steps are already explain with images you can check this How Do Set up Dell Wireless Printer Install Dell Wifi Printer Fixotip

If it is pure yellow I would look at the yellow imaging unit (drum) to make sure that it is ok. That is likely the culprit if changing the toner did not resolve the problem.

change yellow cartridge

See the manufacturer's web-site:

http://support.lexmark.com/index?segment=SUPPORT&userlocale=EN_CA&locale=en&productCode=LEXMARK_X5435&page=product&frompage=null#1

for the 'X5435' (not the 'X543') printer, and select to download the "manual", which tells you how to maintain your printer.

Please click on the link to see instructions on how to go about the procedure.

http://bit.ly/oUEvAZ

For further assistance, please call Lexmark Technical Support.

If you follow the link and download the drivers and install, your printer will work properly
http://support.lexmark.com/index?productCode=LEXMARK_X5340&page=driversdownloads&linkSelected=node2%5Esubnode2&locale=EN&userlocale=EN_UK

don't forget to set this printer as default in the printers folder in your control panel

A technician is needed to replace the printer's fuser. Please contact Lexmark Technical Support.

very simple there is a waste toner bag that came with your Lexmark X543, so you need to remove it and dispose of the toner inside and replace exactly the same you took it and the message will message will disappear

Find it at Lexmark - United States.

The specs for your model Epson allows you to connect the you network by wireless and by LAN cable.

The specs are as follows :-
Wi-Fi Wireless LAN IEEE 802.11b/g – compatible with 802.11n*
*Transmission rate will be limited to 802.11g and will operate in the 2.4 GHz frequency band
Ethernet Wired LAN IEEE 802.3 (100BASE-TX, 10BASE-T)
Other PictBridge
Wireless security
WEP – 64bit
WEP – 128bit
WPA – PSK (TKIP) – compliant with WPA2
WPA – PSK (AES) – compliant with WPA2

To connect the printer by a LAN cable you need to configure the Epson for an IP address that suits your network configuration and connect the LAN cable to your wireless router/hub.

The reason why you cannot print using wireless is because the wireless configuration in the Epson is not setup with the router's wireless configuration ie. SSID WPA encryption etc.

For instructions of setting up a LAN network printer, please click on this link and follow my instructions :-
http://www.fixya.com/support/r3668797-setting_up_shared_network_printer

For instructions on setting up a wireless printer, the Epson wireless settings need to be configured with the router's wireless settings. Go into your router's wireless and note the SSID, and encryption settings etc and configure the Epson's wireless settings with the router's wireless settings. This will allow the Epson to connect to the wireless router. Please click on this link for instructions to secure your wireless network, configure the wireless router (if you have not already do so) and configure the wireless card in the computers and wireless printer (the instructions for configuring the wireless card in the printer is the same as for the wireless card in the computers via the printer's menu screen).
http://www.fixya.com/support/r3559128-wireless_router_security