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I need 5v 2a to power a screen

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I couldn't get anything to work to power a screen that goes with my raspberry pi. I tried an apple ipod charger which said it outputs 5v @ 2.4A, but that didn't work either. Would the usb cable I'm using be the problem possibly?

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What are you connecting it to? Most any phone to wall outlet should be fine 

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1 minute ago, RedWulf said:

What are you connecting it to? Most any phone to wall outlet should be fine

Raspberry pi tft screen, amazon says it runs at 5v 2a but when I try to use that it flickers on for a split second every few seconds

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20 hours ago, whitephoenix said:

Raspberry pi tft screen, amazon says it runs at 5v 2a but when I try to use that it flickers on for a split second every few seconds

The small USB outlet chargers from Apple usually are only capable of 1amp unless your using the larger ones for IPads which I believe can give up to ~2.5amps. Try using another charger or a power adapter from the wall directly. 

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