NES Display Problem...

[LosOjos]

I'm clutching at straws with this one, but here goes:

 

I recently bought a NES from eBay, and upon arrival it was in a sorry state (which allowed me to claim back £10, so I can't complain).

 

The sound produced a loud hum, the picture constantly jumps up and down on the screen (only by about 1 pixel but it makes playing it for any length of time a real strain on the eyes), the cartridge loading mechanism was broken so games wouldn't stay down and half the time games wouldn't load. Oh, and only one of the 5 cartridges that came with it worked at all.

 

Well I fixed the loading mechanism, cleaned realigned the 72-pin connector and opened up the cartridges so I could give the connections a good clean, and that has worked wonders, it now loads all the games first try.

 

I managed to fix the sound issues by replacing the PSU (the one that came with it was a 6v DC @ 400mA) with a more powerful one (9v DC @ 600mA).

 

However, I'm still left with the screen jumping issue. Based on the fact the new PSU fixed the sound, I'm thinking of trying a PSU with a stronger current, maybe 1A.

 

Before I do that however, has anybody else ever had this problem and managed to fix it?

 

Like I say, it's a long shot, but thought I might as well try...

[mattstevenson2005]

I'm clutching at straws with this one, but here goes:

 

I recently bought a NES from eBay, and upon arrival it was in a sorry state (which allowed me to claim back £10, so I can't complain).

 

The sound produced a loud hum, the picture constantly jumps up and down on the screen (only by about 1 pixel but it makes playing it for any length of time a real strain on the eyes), the cartridge loading mechanism was broken so games wouldn't stay down and half the time games wouldn't load. Oh, and only one of the 5 cartridges that came with it worked at all.

 

Well I fixed the loading mechanism, cleaned realigned the 72-pin connector and opened up the cartridges so I could give the connections a good clean, and that has worked wonders, it now loads all the games first try.

 

I managed to fix the sound issues by replacing the PSU (the one that came with it was a 6v DC @ 400mA) with a more powerful one (9v DC @ 600mA).

 

However, I'm still left with the screen jumping issue. Based on the fact the new PSU fixed the sound, I'm thinking of trying a PSU with a stronger current, maybe 1A.

 

Before I do that however, has anybody else ever had this problem and managed to fix it?

 

Like I say, it's a long shot, but thought I might as well try...

 

What does it say the correct voltage should be, it should be on the sticker on the bottom. You CANNOT use a different voltage than the one it need, use a voltage that is too low and the machine will not start and use a voltage that is too high and you will burn the unit out, you CAN however use a PSU with a higher current output as the unit will only pull the current it needs to work.

 

Hope that helps

 

Matt

[LosOjos]

What does it say the correct voltage should be, it should be on the sticker on the bottom. You CANNOT use a different voltage than the one it need, use a voltage that is too low and the machine will not start and use a voltage that is too high and you will burn the unit out, you CAN however use a PSU with a higher current output as the unit will only pull the current it needs to work.

 

Hope that helps

 

Matt

 

Cheers Matt,

 

the original PSU for NES was around 9v AC I think, but the first part of the circuitry converts this to DC @ 5v, so you can safely use up to 12v of non-polarised DC with the NES. I didn't know that about the current output though, I was worried I'd go too high on that one, so thanks for that I can worry a little less about what I'm plugging in to it now.