N64 black screen / no display (Jumper Pak, cartridge slot and power checks)
An N64 with its power light on but no picture is most often a poor contact at the cartridge slot or the Jumper/Expansion Pak, or a weak power supply. Work through cleaning and swapping the easy parts first, then measure the supply rails and reset lines before suspecting the main chips.
Written by the CircuitScope research team in our own words, from the sources listed at the end, and checked by our moderators.
An N64 with its power light on but no picture is most often a poor contact at the cartridge slot or the Jumper/Expansion Pak, or a weak power supply. Work through cleaning and swapping the easy parts first, then measure the supply rails and reset lines before suspecting the main chips.
Difficulty: Moderate · Time: about 1.5 hours
Symptoms
- Power LED lights but the TV shows a black screen or no signal
- No picture with every cartridge, or only with some
- Power LED off, dim or flickering (points to the power supply)
- TV blips only when the console is switched off
Likely causes
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