node.js - mint update failed to fetch ppa 404 not found -

i'm on mint 17.1 rebecca cinammon 64.

when run sudo apt-get update recieve following error.

err http://ppa.launchpad.net trusty/main sources       404  not found err http://ppa.launchpad.net trusty/main amd64 packages   404  not found err http://ppa.launchpad.net trusty/main i386 packages   404  not found ign http://ppa.launchpad.net trusty/main translation-en_us ign http://ppa.launchpad.net trusty/main translation-en fetched 607 kb in 2s (222 kb/s)                w: failed fetch http://ppa.launchpad.net/richarvey/nodejs/ubuntu/dists/trusty/main/source/sources  404  not found  w: failed fetch http://ppa.launchpad.net/richarvey/nodejs/ubuntu/dists/trusty/main/binary-amd64/packages  404  not found  w: failed fetch http://ppa.launchpad.net/richarvey/nodejs/ubuntu/dists/trusty/main/binary-i386/packages  404  not found  e: index files failed download. have been ignored, or old ones used instead. 

i looked around internet , seems issue ppa

i changed "base (trusty)" official repository default, 1 in uk, closer one.

in /etc/apt/sources.list have:

#deb cdrom:[linux mint 17.1 _rebecca_ - release amd64 20141126]/ trusty contrib main non-free 

and /etc/apt/sources.list.d/richarvey-nodejs-trusty.list looks like

deb http://ppa.launchpad.net/richarvey/nodejs/ubuntu trusty main deb-src http://ppa.launchpad.net/richarvey/nodejs/ubuntu trusty main 

any appreciated if need more info let me know. want update computer.

i'm running same os (mint 17.1, cinnamon) , followed instructions here install node.js. note, came across website while reading installation instructions on joynet's github page.

i'm wondering if ppa no longer updated (last update 2 years ago)? remove ppa following instructions here, removing current node binary , follow instructions above.