Why does the dash cam always fail to display images?
4 Answers
The dash cam not displaying images is mostly due to power supply issues or machine malfunctions. It is recommended that users check the power supply. Since the dash cam plug is always inserted into the socket, when the vehicle is moving, the vibration and shaking of the car body can inevitably cause the plug to loosen. Try unplugging and reinserting the plug, and observe if there is any response on the screen. If there is still no response after multiple attempts, the cause of a loose plug can be ruled out. Relevant information about dash cams is as follows: Introduction: A dash cam is an instrument that records images, sounds, and other related information during vehicle travel. Function: After installing a dash cam, it can record the entire process of the car's travel, including video images and sounds, which can provide evidence for traffic accidents.
I've also encountered the issue of a dash cam not displaying any footage. Here are the main areas to check: The most common causes are a loose power cable connection or poor contact at the cigarette lighter socket. Another frequent issue is a full or corrupted memory card, which can prevent recording and result in a black screen. The camera lens might also be damaged from sun exposure, especially common during hot weather. Last summer, I noticed severe fogging on my lens due to condensation, and simply wiping it clean with a tissue fixed the problem. System crashes are also common; a long press on the reset button usually resolves this. Sometimes, the auto-screen-off feature in settings might be mistakenly perceived as a malfunction—try tapping the screen twice. My advice is to first unplug and reconnect the power cable, try a new memory card, and if the black screen persists, it's best to seek professional repair rather than attempting to disassemble it yourself, as the lens wiring is delicate and easily damaged.
I've researched the issue of dash cam black screens multiple times, mainly focusing on hardware and software aspects: A burned-out power adapter can cause the entire device to lose power, which can be diagnosed by testing voltage with a multimeter; Loose or door-pinched video output cables are also common causes; Storage chip failures leading to data read errors can directly result in black screens; System version conflicts may require firmware reinstallation; I once encountered a case where GPS module overheating caused the entire device to freeze. Notably, modified vehicles without step-down wiring will drain the battery with 24/7 parking surveillance. Here's a simple test method: Remove the dash cam and power it with a portable charger, then connect to a computer to read the file system - if it displays normally, the issue lies with the vehicle's electrical circuit. Prioritize checking the power supply lines in the fuse box, and avoid randomly disconnecting factory wiring harnesses.
There are actually many reasons why a dash cam might not display images: the screen itself could be damaged, cracked by sunlight; the TF card slot's spring contacts might be deformed, preventing proper connection; aging batteries can cause settings to not save after power loss; corrupted system files can cause the device to get stuck on the startup screen. If the auto-shutdown time in settings is accidentally set to 1 minute, it might also be mistaken for a malfunction. The lens protective film not being fully removed or covered in dust can block the photosensitive element. A burnt-out power management IC is the most troublesome issue, requiring factory repair. It's recommended to first clean the gold finger contacts with alcohol swabs and try a different data cable. For newly purchased devices, make sure the mounting bracket is properly secured—once I thought the device was broken because the clip wasn't fastened tightly. When driving at night, screen glare might just make it hard to see, which can be resolved by increasing the brightness.
