It is known to get very dirty as well as bent out of shape with regular use. The NES 72 Pin Connector is what connects the game cartridges to the mainboard. If this does not resolve the issue, inspect and test the PPU as detailed in No Video - Sound Present. If there is no activity on the PPU, replace the PPU.įollow the steps for the blinking red light issue as this problem is often caused by poor contact with game cartridges with the 72pin connector, or the 72pin connector and the motherboard.
If there is activity on the PPU inspect the capacitors on the RF Modulator module visually and with an ESR meter. If there are no shorts replace the 7805 voltage regulator and test operation.Ĭheck the operation of the PPU IC with a logic probe. If the voltage is significantly lower check the main board for shorts. Another known method is boiling the connector to clean and "reset" the pins to factory spec, although this should generally be used as a last resort.Ĭheck and confirm 5V at the 7805 voltage regulator on the Power/RF modulator module. This process can be very easy or very tedious depending on whether repair has been attempted beforehand. This must be done carefully as breaking or overcorrecting a pin can lead to the whole connector no longer being viable for use. If cleaning the connector doesn't correct the issue the next step is to attempt to adjust the pins on the connector by hand. If you don't have an Ultrasonic Cleaner, you can clean the pins carefully with Isopropyl alcohol or contact cleaner and a toothbrush, and allowing the connector to dry before reassembly for testing. The most effective way to clean the connector is with an Ultrasonic Cleaner. First disassemble the unit to access the connector. Keep in mind most third party replacements are of low quality, refurbing the original part is always preferred.
If the NES still can't read the game the 72-Pin connector in the system needs refurbishing/replacing. System not reading game cartridges with blinking red lightįirst ensure the pins on your cartridge are clean. The Nintendo Entertainment system is the first home console released in America by Nintendo.
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