# SP 303 Not powering.

**URL:** <https://forums.syntaur.com/t/sp-303-not-powering/6646>\
**Category:** Synth Repair\
**Created:** [January 12, 2024, 5:50pm UTC](https://forums.syntaur.com/t/sp-303-not-powering/6646 "2024-01-12T17:50:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![yyrgx](https://forums.syntaur.com/letter_avatar_proxy/v4/letter/y/e9a140/32.png) [@yyrgx](https://forums.syntaur.com/u/yyrgx)\
**Post date:** [January 12, 2024, 5:50pm UTC](https://forums.syntaur.com/t/sp-303-not-powering/6646/1 "2024-01-12T17:50:15Z")

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Hello, was recommended to ask on here about my SP303 not powering on. I have swapped the power input jack and still no power to the unit. Would it be worth it to continue attempting to repair the unit or just purchase a replacement?

thanks!

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**Author:** ![Travis](https://forums.syntaur.com/user_avatar/forums.syntaur.com/travis/32/1382_2.png) [@Travis](https://forums.syntaur.com/u/Travis)\
**Post date:** [January 13, 2024, 10:32pm UTC](https://forums.syntaur.com/t/sp-303-not-powering/6646/2 "2024-01-13T22:32:56Z")

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It’s always worth it to attempt repairing! If you’re keen on doing it yourself the only way to know for sure what the problem is would be to use a multimeter/voltmeter and take some voltage measurements of the power supply.

The service manual for these is available by googling, have a look at the power supply schematic. You would need to measure the digital 3.3 V and 5 V, and the analog 8.5 and 5 V and make sure they’re the correct value. If anything is off then that is a hint to what component has failed.

If you have any questions feel free to ask, or if you don’t feel up to it there’s a list of service centers on our website.  
[https://www.syntaur.com/service\_centers.html](https://www.syntaur.com/service_centers.html)