Acer Laptop won't recognize new HDMI cable

Manufacturing fault?

Are you able to use the display selector on the laptop to see if you can switch to HDMI manually? There should be some sort of display menu button most likely on one of the function keys

Do you have any other device you can hook up to the TV with the HDMI cable, like an xbox or playstation?

10 meters is really long as HDMI cables go. Normally when you make long cables, you make the wires thick so signal attenuation is minimized. But HDMI has so many wires that this is really difficult (the 8m cable I have is nearly as thick as a garden hose).

Likely what is happening is that the laptop just isn't putting out enough power over HDMI for the signal to entirely make it to the TV. Some of it is getting through so the TV knows something is connected. But not enough is making it through for a picture. Your media player is likely pumping out more voltage, enough for the signal to make it to the TV.

Since you can't change the laptop's HDMI port, you've got two choices. Return the cable and get a new 10m cable using bigger wires (yours is probably using 28 gauge wires; my thick one uses 22 gauge). Problem with this solution is that you have a thick cable which is unsightly and hard to get around corners (mine is in the attic crawlspace).

The other solution is to get a RedMere cable. These cost a lot more, but they basically steal some power from the TV, transmit it back to the laptop, and use the extra power to amplify the source signal before it's sent to the TV. This allows you to make longer cables without using thicker wires. I don't know what country you're in, but in the U.S. a 40 ft (12m) RedMere cable costs about $50 from Monoprice.
http/www.monoprice.com/Category?c_id=102&cp_id=10240&cs_id=1025507

Be aware that RedMere cables are directional. One end must plug into the TV, the other end must plug into the video source.