My fluke 45 multimeter displays error 6. how can i solve it?

clean terminals with cotton bud and ISO and then blow with air

dirty terminals may trigger 'leads' error

This is explanation on Error 6 from Service Manual:
EEROM (A1U5) meter configuration corrupted or EEROM not initialized. At power up, A1U6 reads CRC from EEROM (A1U5) location, then reads configuration data from another location in EEROM, calculates an algorithm to compare to the CRC. If an error is determined, the meter configuration is set to factory default and Error 6 is displayed.
You can find service manual with troubleshooting procedure here: http://www.fluke.com/Fluke/usen/Support/Manuals/default.htm?ProductId=56082

send back to Fluke for repair

check and clean switch connections

F8 Error - invalid model -you will have to return to Fluke for service

F8 Error - invalid model -you will have to return to Fluke for service

try cleaning elastomerics and display contact (it may need new display) if unit powers up

Switch is the problem here, see if you can clean contacts or check if switch contacts are broken.

Free Fluke 45 Service manual here. 2MB Size.

http://www.pdfebooksdownloads.com/download/Service%20Manual_aHR0cDovL29sZHJhZGlvLnRlc2xhLmh1L3Jhanpvay9tdXN6ZXJlay9mbHVrZTQ1LnBkZg==

You will have to send it to Fluke if you want to repair it. The North American Service Center phone number is 1-888-99FLUKE.