NES lockout chip

[tz101]

I have a NES I decided to disable the NES10 chip in. I went by the instructions and clipped pin no. 4. Now, no matter what cartridge I insert, all I get is a flashing gray colored screen. All contacts have been cleaned on the cartridges and the 72 pin connector. Before I clipped the no. 4 pin, all cartridges worked fine. Everything I have read tells me that it is not absolutely necessary to solder a ground wire to the clipped pin, but maybe that is what I need? Anyone have a suggestion?

[+GroovyBee]

Post a close up and in focus picture of the chip you've modified on the PCB. What sort of test tools do you have? Have you got a DVM and a soldering iron (just in case)?

[DeadlyDiskKun]

I hope you did not clip the 4th pin on the wrong side or something... because that will explain the grey screen. Yikes.

 

Here, look at this:

 

 

This is a map, I have made.

[shadow460]

If you clipped the wrong pin, it's nothing to worry about. You can simply get a replacement chip from any of your NES carts.

[tz101]

I hope you did not clip the 4th pin on the wrong side or something... because that will explain the grey screen. Yikes.

 

Here, look at this:

 

 

This is a map, I have made.

 

The pin you have circled is exactly the pin I have cut

[kool kitty89]

Was the NES working fine prior to the modification?

 

The ground should not be an issue, however, there may be a chance you fried something else on the board with static discharge -if you weren't grounded when workin on it and you touched pins on the board -didn't handel it from the edges only, this is still unlikely though. (inless you've got really low humidity or shag carpet...)

[tz101]

Post a close up and in focus picture of the chip you've modified on the PCB. What sort of test tools do you have? Have you got a DVM and a soldering iron (just in case)?

 

I have a soldering iron, but do not know what a DVM is. Please elaborate.

[+GroovyBee]

I have a soldering iron, but do not know what a DVM is. Please elaborate.

DVM = Digital VoltMeter

 

Can you upload a picture of your mod as previously requested?

[tz101]

I have a soldering iron, but do not know what a DVM is. Please elaborate.

DVM = Digital VoltMeter

 

Can you upload a picture of your mod as previously requested?

ok, i have an analog volt meter. i have a cheaper digital camera, and tried but have been unsuccessful at getting a good enough picture to post. my cell phone camera might do it, but have no way to get the picture to my pc for posting. from the picture posted by deadlydiskkun, i am certain i have clipped the same connector he has circled.

[DeadlyDiskKun]

I have a soldering iron, but do not know what a DVM is. Please elaborate.

DVM = Digital VoltMeter

 

Can you upload a picture of your mod as previously requested?

ok, i have an analog volt meter. i have a cheaper digital camera, and tried but have been unsuccessful at getting a good enough picture to post. my cell phone camera might do it, but have no way to get the picture to my pc for posting. from the picture posted by deadlydiskkun, i am certain i have clipped the same connector he has circled.

 

Was there a plus + next to the forth pin?

[tz101]

yes, there was a + sign on the board kind of between the third and fourth pin. tell me: i tried to solder on a ground wire, and then took it off. could the heat from my solder iron somehow damage the NES10 chip?