T POWER 12V Ac Dc Adapter Charger Compatible with Belkin & Netgear Wireless Router , TP-LINK & D-Link Modem , Motorola , eero Home WiFi System Power Supply Cord

this is a Netgear modem but this peak should work for any other brand modem or router so the other day this modem lost power and obviously lost Internet as well so I plugged this modem to a different outlet but the modem still had no power but before throwing this modem in a garbage I decided to check voltage output from the power adapter by using a basic multimeter that I got a long time ago for about 10 or 20 bucks if you have a similar multimeter set the dial at 20 volts DC if you don't have any numbers on it just set it to volts DC and the symbol for it looks like this now place one of the leads inside it doesn't matter which one for this test either red or black and the other lead on the outer part of the jack and I get a reading of 7.8 volts DC and if I switch leads around I'll get the same number with the minus sign in front of it this basically means that this power adapter conv