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r/techsupport • … • u/TheDarkMusician

Can an HDMI cable transmit enough power to break a display?

I purchased [this HDMI splitter](https://www.amazon.com/OREI-HDMI-Splitter-Out-Duplicate/dp/B005HXFARS/ref=cm_cr_arp_d_product_top?ie=UTF8) awhile back for a gig and was trying to set it up at home. I couldn't find the power cable, so I tried a couple that were nearby until I found one that turned it on and assumed it was correct. I connected 2 of my tvs, one a 5 year old refurbished TCL and the other a 10+ year old Toshiba. Everything looked great, and I kept both units on for a few hours. When I came back to them, the Toshiba was dead with no power light even turning on, and I can no longer use the HDMI port it was plugged into on the TCL. With this, I have 3 questions: 1. Did my negligence in grabbing a random power supply break these tvs through the hdmi ports? 2. If so, is the Toshiba salvageable? 3. I found the original power cable, should I feel safe using the device as intended, or is this a sign of a bad/dangerous device? Thanks!

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