My screen on my nes is blurry how can i fix that

If your screen shows a blurry image it can be a few possible things (and only these things).

1. The first and most obivous problem is being on the wrong channel - for example, if you are on Channel 3, but the switch on the back of your system is set to channel 4, you'll see a VERY fuzzy picture; simple switch to the other channel and it will come in clear.

2. Now...assuming you are on the correct channel, does your television receive other pictures clearly (for example if you change to a normal broadcasting station and it is still blurry, then it is a problem with your TV and not your NES system). Another way to test is to simply switch TVs and see if the same picture problem occurs.

If 1 and 2 are not the problem, them we know the problem is with your NES system and this should be an easy fix.

If you are using an RF Switch, then it is most likely the pin on either end of the switch has become bent (or was bent and now is bent back) and will no longer give a clear picture. The easiest way to test this is find a set of AV cables (any av cables - these are the red, white, and yellow cables that often hook DVD players to television). Find a set and just take one of those ends and connect it to the side of the NES system into the circle that says VIDEO and take the other end of that same color and put it into your TV into the circle that says VIDEO (note that the colors don't always match up on the newer TVs, just make sure that if you are using the yellow end of the AV cable and plug it into the video on the NES that you plug the other yellow end of the av cable into whatever color on the TV says VIDEO! Then change your tv to the cannel for that AV slot (usually AV 1 or INPUT 1). Turn the nintendo back on and see if the picture comes through clearly - if it does, it means you had a bad RF switch and you can either get a new one, or just use AV cables instead!

One of the above problems IS the problem - I've repaired over 1000 NES systems and 95% of the time it's just a bad RF switch (so the AV cable test works best)

My tv plays channels and video clearly and its not the RF because I always use red, yellow or white av cables and its still blurry, I bought the NES console and 6 nes games from a comic book video game store and the guy cleaned the games in front of me by rubbing alcohol on the cartridges chips and used a 3rd party nes 72 pin, so why is the games still blurry when I play them ?