For situations where all monitors show a black screen, we have provided possible troubleshooting issues below. Please refer to the following suggestions for assistance, If the issue persists, please reach out to the TESmart Customer Service Center for further assistance. You can contact us through the chat window at the lower right or by submitting feedback. Our dedicated team of professionals is ready to help and provide after-sales support.
Applicable product models: Dual Monitor KVM; Triple Monitor KVMHKS0402A1U/HDK0402A10/HKS0202A2U/HKS0402A2U/HKV0402A1U/HKS0802A1U/PKS0802A10/HKS0403A1U etc.
Dual/Triple Monitor KVM Switch Only one monitor can display
If you have at least 1 video connection from each computer then using the Mode 2 feature (each computer on each monitor) you can test the KVMs output to the monitors. Both displays should work when Mode 2 is active. This confirms the KVM output is working fine. Further investigation is needed to determine whether the issue lies with the KVM input port or the input cables.
If you have only one monitor working, it's likely that you're missing the second video connection or the dock/adapter you're using is incompatible. Even if the adapter works when not connecting it to the KVM, it is possible that the adapter does not work well in the KVM environment.
Firstly, Please try connecting the black-screen monitor directly to the computer (bypassing the KVM) and check if the issue persists. If the monitor still has no image, it suggests that the problem may lie with the source, monitor, cable, or docking station. It's important to keep the original cable or connected converter unchanged during this testing process.
Secondly, how to determine whether the issue lies with the part connecting to the KVM including KVM ports, and input/output cables?
Please take the following cross testing methods to troubleshoot specific problems. For detailed crossover experiments, please jump to this link.
Dual/Triple monitor KVM switch at least one input source can be displayed properly.
If PC 1 works well with both monitors but PC 2 does not then you can swap PC 1 over PC 2 Inputs. If PC 1 works fine on both inputs, this confirms the KVM is working fine and the issue is related to PC 2. Could be the port, adapter, or dock being used. For detailed crossover experiments, please jump to this link.
If all of the steps above cannot help you locate and resolve the problem, please contact TESmart Customer Support for further assistance. Briefly mention the steps that you’ve already tried for a faster solution.