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my kenwood car stereo K D C-u2263R always showing send service so how can solve this problem i did reset the system but not changes

Kenwood equips its receivers with a protection mode to safeguard them. Your stereo receiver is going into protection mode because the receiver has an internal short, a speaker is bad or the speaker wiring has a problem, such as incorrect wire gauge or bad connections. Many of the problems that trigger protection mode can be resolved or at least diagnosed by tech-savvy owners, without bringing your car into the shop. Step Reset the receiver by removing the face plate and pressing the “Reset” button with a paperclip. If this solution doesn’t fix the problem, continue with troubleshooting and reset the receiver after each step. Step Turn off the receiver and disconnect all speaker wires. Step Turn on the receiver. If it quickly shuts off, the receiver has an internal short, according to Kenwood. Contact Kenwood customer service to have the unit repaired. Step Connect one speaker at a time. If the receiver shuts off after connecting a speaker, that speaker’s wiring or the speaker itself has a problem. Step Replace any faulty wiring. Step Replace a speaker if you have replaced its wiring and your receiver is still going into protection mode.

Try this video  https://youtu.be/rCU5BmIPxcs  Goodluck

I had to disassemble my stereo, it turns out the fan was pulling too much amps on start up and wouldn’t start spinning to cool it, so it shut off to protect itself, I removed the fan and hooked it onto a power drill to free it up. Threw it back in and the protect mode never came back.

see this video it’s resolved my problem https://www.youtube.com/watch?v=FjQiuy5w