$20 is a great deal on this switch. Be sure you ask for "4 in and 1 out." I have an hp, Mac mini, Apple TV and a PS3 all hooked up to this. I also have a bi-directional "1 to 2" switch to switch between a big screen and my smaller flat screen that I use for my two computers (mainly). At first nothing worked. So I read the directions (hey, I'm a guy, what do you expect?). The directions are written for a person with 20/10 vision. You definitely need a magnifying glass to read them. And this is the reason why I only gave this four stars. Troubleshooting it was a pain in the posterior. Be sure your HDMI cables are clean and reinsert them several times. The gold ones I had did not work at all. The cheap silver ones worked great. Be sure to try a new one in any troubled port before you throw the towel in. At first I was ready to back it up and send it back, but with some time and work, I got everything to work just fine. I would recommend this to anyone who wants to expand their tech stuff and make it easier to manipulate.
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