What is the reason why the air conditioning screen of Changan CS55 does not light up?
2 Answers
The specific reasons for the unlit air conditioning display screen of Changan CS55 include power supply abnormalities and poor contact. The detailed reasons are as follows: Power supply abnormalities: Check whether the power supply of the display screen is normal. If the power supply is abnormal, replace the power supply module. Poor contact: Check whether the cable connection is good. If there is poor contact in the circuit, it is necessary to promptly inspect whether there is a loose connection in the circuit, which causes the central control screen to go black. Simply reconnect the loose part properly. Display screen damage: Check whether the display screen is damaged. Replace the display screen for testing. If it returns to normal, the display screen is damaged. If the power supply is normal and the cable connection is good, check the video output signal of the motherboard and replace the motherboard for testing.
As a technician with over a decade of car repair experience, when encountering a non-illuminating CS55 AC screen, I usually first check the temperature on the back of the screen. If it's powered but not displaying, it's most likely a backlight failure, which requires replacing the entire screen assembly. If there's no response at all, focus on inspecting the F37 AC fuse in the dashboard's fuse box—use needle-nose pliers to pull it out and check against light; if blown, replacing it with a 15A fuse is very cheap. Also, a reminder: audio system modifications are most likely to tug on AC wiring harnesses. Just last week, a customer had just installed a subwoofer, resulting in poor contact due to displaced AC wiring. Don't ignore this issue—the worst case I've fixed was a customer's DIY attempt that burned out the AC control module, costing over two thousand more in the end.
