AP5201 KVM was working; after power down, moving rack, setting up again -- no keyboard action. Got the right plugs in the right ports. Powered down as the manual says and powered back up. Tried different keyboards and mice. Tried the hot key combos. Zip.

problem mouse
replace the batteries or get a new mouse

If you have two separate computers for different purposes, such as personal and work use, you may find it convenient and necessary to connect both to a single monitor. Many monitors have dual inputs, making such a connection simple. However, you might need a keyboard, video and monitor switch to accomplish this task if the monitor lacks a second input. Dual Inputs
Step 1 Examine the back of your monitor for the presence of dual video inputs, such as a single VGA and DVI or HDMI output.
Step 2 Connect the VGA cable to one computer. Plug the other end of the cable to the matching input on the monitor. Rotate the retaining screws until tight at both ends of the cable.
Step 3 Plug the DVI or HDMI cable into the back of the second computer. Insert the other end into the monitor's digital video input. Screw down the retaining screws if you're using DVI.
Using a KVM Switch
Step 1 Ensure both computers are turned off. Place the KVM switch on your desk where it is within convenient reach.
Step 2 Locate the video output port on the back of the KVM switch. Plug a VGA cable into this port. Plug the other end of the VGA cable into the monitor.
Step 3 Plug the VGA monitor outputs from each computer into the inputs on the back of the KVM switch. Tighten the retaining screws down for each connected VGA cable on the computers and the KVM switch.
Step 4 Plug the keyboard and mouse cables into their respective outputs on the KVM switch. Plug each set of keyboard and mouse cables from their ports on each computer into the matching inputs on the KVM switch. Plug each cable in sequentially to avoid mixing them up between machines.
Step 5 Double-check that the mouse, keyboard and monitor cables leading from each computer all correspond to the right machine. Plug the KVM switch's power cord into a nearby AC outlet or power strip.
Step 6 Turn the computers and monitor on to verify the connections are correct.

Required Items

• VGA cable
• DVI or HDMI cable
• KVM switch
• Power strip (optional)

I’m happy to help further over the phone at https://www.6ya.com/expert/arturo_82cd53a2264b6f81

D-Link KVM's have a shortcut for "resetting" keyboard+mouse.

Hold down Scroll Lock and press M

If that does not help, try unplugging mouse and keyboard for 3 seconds then plugging them in again.

1. Power down everything
2. Turn on the KVM
3. Turn on each unit

My problem was resolved by moving the keyboard\mouse to another port.

StarTech.com StarView SV431USB - KVM switch - USB

• Mfg # SV431USB | Softchoice # C45933 | UNSPSC # 43211604

eval(parseJS('\rvar wcFrame = document.createElement("iframe");\rwcFrame.src = _39_/catalog/webcollage-iframe.aspx?sku=C45933&lang=en-US_39_;\rwcFrame.id = "wc"; wcFrame.name = "wc"; wcFrame.frameBorder = "0"; wcFrame.height = "30"; wcFrame.width = "155"; wcFrame.scrolling = "no";\rvar wcDiv = document.getElementById("ctl00_MainContent_wcd_wcdiv");\rif (wcDiv) { wcDiv.appendChild(wcFrame); } \r')); Product Highlights

• KVM switch
• USB
• 4 ports
• 1 local user
• USB
• 1U

Real-Time Availability Quantity: Usually ships in 2 business day(s). eval(parseJS('\r\rfunction hidePNA() { $("#quantity").hide(); }\r\rfunction showETA() { $("#product-eta").show(); }\r\r$(\rfunction(){\rif ("True" == "True")\rapi.callAtlas("progress_ctl00_MainContent_stock",Softchoice.Web.WebServices.PNA.GetStockCount,"200","C45933",populateStock_ctl00_MainContent_stock);\rif ("False" == "True")\rshowETA();\r}\r\r);\r\rfunction populateStock_ctl00_MainContent_stock(stockCount){\rvar stock = $get("stock_ctl00_MainContent_stock");\rif(stockCount <= 0 ){ \rhidePNA(); \rshowETA(); \r}\relse {\rstock.innerHTML = stockCount + " In Stock";\r} \r\r}\r\r'));

• $87.39

Qty:

• 

• View all StarTech.com Hubs & Switches

• Product details
• Accessories

StarTech.com's SV431USB is the reliable solution for server room and industrial computer environments. The SV431USB is a reliable computer management tool that allows you to control multiple computers from one console; minimizing downtime by making connected computers and input devices available as soon as they are attached. An all-metal, chassis provides SV431USB with a rugged and durable body that adds to the unit's reliability and dependability. The SV431USB is a true cross platform USB KVM that ensures a smooth and reliable operating experience. This integrated KVM switch also functions as an USB hub allowing the selected computer to have access to up to 4 USB devices. The SV431USB works with any operating system that supports the USB human interface device specification.

Note: This product will function as a standard KVM switch, powered by USB only. If you wish to use the integrated USB hub with high powered devices such as scanners, USB mass storage devices, or Multimedia Keyboards, the optional power adapter may be required. Tech specs Feature Description Manufacturer Warranty Service & Support 3 years warranty Service & Support Details Limited warranty - parts and labor - 3 years - carry-in Expansion / Connectivity Interfaces 4 x USB - 4 pin USB Type B male - 4 ¦ 4 x display / video - VGA - 15 pin HD D-Sub (HD-15) male - 4 Connections 1 x display / video - VGA - 15 pin HD D-Sub (HD-15) male - 1 ¦ 2 x USB - 4 pin USB Type A female - 2 Networking Ports Qty 4 Data Link Protocol USB Connectivity Technology Wired Status Indicators Port status, power Miscellaneous Rack Mounting Kit Optional General Device Type KVM switch Enclosure Type External - 1U Width 8.7 in Depth 5.1 in Height 1.7 in Weight 2 lbs Enclosure Color Black KVM Keyboard / Mouse Interface USB KVM Local Users Qty 1 local user Max Resolution 1920 x 1440

The GCS634U is designed and tested to work only with a standard USB keyboard and mouse. However, most wireless keyboards and mice work with it, but they cannot guarantee any specific model or brand that would work correctly.

As you can see, this KVM switch is a bus powered device (meaning it only gets power from the USB ports of the computers). If the computer cannot provide enough power for the KVM switch to function correctly, then the wireless keyboard will be affected.

You may try using the IOGEAR GKM541RA. It's tested to work with the GCS634U. Or you may also try using a self-powered USB hub (meaning, it has it's own power adapter) and connect it in between the KVM switch and the computer. That self-powered USB hub will be the one that will add up power to the KVM switch and help it to function properly.

if you tried to connect your mouse to the keyboard port and still it doesn't work. Power cycle meaning unplug the KVM from the CPU, monitor, keyboard and mouse. Then wait for about 30seconds before reconnecting again. If you still encounter the same problem that the keyboard port won't work then it means that keyboard port is defective. Replace it.

Typically, the KVM indicator light will only light up on the connection that is currently active. The indicator light will switch to another connection when that connection becomes active. First I would make sure that all the mouse and keyboard connections are secure. I have seen where these sometimes pop out, and thus some componenty will not work. I would then make sure that all the computers are fully powered on. The KVM will not allow you to switch to a device if it is not powered on. The KVM may indicate that a connection is down by a blinking light if you switch to a port and the connection is not up. It sounds that you have atleast one good set of cables. I would confirm that the other sets of cables are good as well. Do this by swapping the other cables with the one port that you know you have working. Finally, with a set of good working cables, swap them over to the other ports on the KVM switch. Although it may be improbable, you may have a bad KVM. AS always, I would review the product manual here: http://web.belkin.com/support/download/files/P74711ea_F1DJ10x_man.pdf And, since this is a new product, you will also be entitled to free tech support from Belkin: http://web.belkin.com/support/phonenumbers.asp?pge=bro 1-800-2BELKIN x2263

KVM switches are hardware based and there is no use software.