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Re: printer error 502
Shut down the printer, check whether the printer has peripheral devices such as a stabilizing power supply, and disconnect them.After five minutes, restart the printer to see whether the fault corrects itself. If the fault persists, the heating component may be faulty and the printer will need to be repaired.
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The problem is simple. The Shiny Silver bar that your Print Cartridges glide back and forth on is the PROBLEM!!!
When the motor that moves the cartridges left and right HAVE TOO MUCH RESISTANCE, YOU GET THE HARDWARE ERROR: 502.
How I fixed it is simple. Take some kleenex, and with power unplugged, clean the bar very well. Then Spray some WD-40 on a Kleenex, and lubricate the shaft!!
After I did this, I could use my DelL A960 as if it were BRAND NEW!!!
Hope this helps some one out there, as I had to figure it out myself!!
I just sprayed windex on bottom of cartridge several times and wiped with paper towel until dark streak of black appeared. Then I dried off cartridge and replaced. It works now. Must have been clogged.
Turn the printer upside down and see if anything falls out. Look inside as well. Maybe something is askew in there. Go the the manufacturer's website to their Support section. Email them or do a live chat. I just typed "hardware eror 502" and found a lot of answers. You might even type the manufacturer's name with just "hardware error".