This is not the problem of our item but the edid communication failure from those displays. Connect and switch between 2 working hdmi inputs. Supports HDMI audio extraction. Supports HDMI in and out up to 4K@60Hz.
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1 in 2 out 4K Splitter UHD 3D HDMI-compatible Splitter HD 1X2 2X1 1080P Switch Split 1 in 2 out Switcher For HDTV DVD PS3/4 Xbox
Aliexpress UK
HDMI splitter cable supports 480i, 480p, 720p, 1080i, 1080p. 1 x HDMI splitter. Type: HDMI splitter cable. HDMI 1 male to 2 female conversion cable supports clear video transmission and high-resolution images, it solves the usual trouble of switching HDMI display devices.
eBay
UGREEN HDMI Cable 4K/60Hz HDMI 2.0 Cable for RTX 3080 PS4 Xbox HDMI Splitter HDMI Switch Aux Ethernet cable 4K 3D Cable HDMI
Aliexpress UK
CONDITION: NEW IN BOX, NEVER USED. MODEL: HD-102. WE WILL WORK TO RESOLVE ANY ISSUES YOU HAVE.
eBay
4K Bi-Direction HDMI Switch 2 in 1 Out/1 in 2 Out HDMI-compatible Switcher Splitter for PS4/3 TV Box 1x2/2x1 Switcher Adapter
Aliexpress UK
Black Compact 2-Way HDMI Splitter HDMI1.4b CEC Support Resolution up to 3D/4K*2K.
eBay
4K*2K HDMI Splitter 1 in 2 out HDMI Video Distributor 1x2 1x4 for 1 Source to 2/4 Screens Duplicate Display PC Monitor Projector
Aliexpress UK
Input and output 24AWG HDMI standard cable can reach up to 24m. Mode 2: HDMI Splitter--Connect 1 HDMI source to 2 displays. (2 display can’t work simultaneously）. [High Resolution & Refresh Rate]: iDsonix HDMI Switcher support 4K@60Hz and backward compatible with 2K@60Hz, 1080P@120Hz, Let you enjoy the ultimate 3D vision. ).
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4K HDMI-Compatible Splitter 1 in 2 out Adapter HDMI-Compatible 1x2 Dual Monitor Full HD 1 to 2 Amplifier for HDTV DVD PS3 Xbox
Aliexpress UK
●Maximum working current is 15ma, V1.4 hdmi switch complies with all HDMI specifications. No signal loss or data transfer issues, even with long cables. However, HDMI splitters are very helpful for house use, especially if you have multiple devices.
eBay
Profession HDMI Adapter Cable 1 Male To Dual HDMI 2 Way Female 4K 3D Y Splitter Cable for Laptop TV Monitor 1080P 1 in 2 Out PC
Aliexpress UK
SKU: 011849 BRAND: AV Link EAN: 5054338118499 WEIGHT: 0.958.
eBay
Profession HDMI Adapter Cable 1 Male To Dual HDMI 2 Way Female 4K 3D Y Splitter Cable for Laptop TV Monitor 1080P 1 in 2 Out PC
Aliexpress UK
HDMI Splitter 1 In 2 Out Cable Adapter Full HD 1080P Male to 2 Female 3D. Condition is New. Dispatched with Evri Postable.
eBay
HDMI 1 Male To 2 Female Y Splitter Cable Adapter 1 In 2 Out For Laptop TV Monitor HDMI Compatible Dual Port Device
Aliexpress UK