# SY77 effects not working 

**URL:** <https://forums.syntaur.com/t/sy77-effects-not-working/1232>\
**Category:** Synth Repair\
**Created:** [November 6, 2019, 6:18pm UTC](https://forums.syntaur.com/t/sy77-effects-not-working/1232 "2019-11-06T18:18:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![BoscoBirdswood](https://forums.syntaur.com/letter_avatar_proxy/v4/letter/b/ad7895/32.png) [@BoscoBirdswood](https://forums.syntaur.com/u/BoscoBirdswood)\
**Post date:** [November 6, 2019, 6:18pm UTC](https://forums.syntaur.com/t/sy77-effects-not-working/1232/1 "2019-11-06T18:18:03Z")

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ey guys, I just got a Yamaha SY77 and had to replace the battery. I performed a factory reset and all is well except the modulation effects aren’t working. When I go to edit them on a patch the reverbs all work and changes to settings can be heard, but the mod effects like chorus and flanger don’t do anything even when balance is 100%, output 100%.

Any ideas what could be the cause? Is there an IC that handles these effects and not the reverb maybe that might be at fault?