# BlinkStick 8th blue LED not working (only pulse/morph, nodejs)

**URL:** <https://forums.blinkstick.com/t/blinkstick-8th-blue-led-not-working-only-pulse-morph-nodejs/1425>\
**Category:** Support\
**Created:** [January 24, 2021, 5:42pm UTC](https://forums.blinkstick.com/t/blinkstick-8th-blue-led-not-working-only-pulse-morph-nodejs/1425 "2021-01-24T17:42:31Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![gabriel.annell](https://forums.blinkstick.com/letter_avatar_proxy/v4/letter/g/a183cd/32.png) [@gabriel.annell](https://forums.blinkstick.com/u/gabriel.annell)\
**Post date:** [January 24, 2021, 10:55pm UTC](https://forums.blinkstick.com/t/blinkstick-8th-blue-led-not-working-only-pulse-morph-nodejs/1425/3 "2021-01-24T22:55:16Z")

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OK so I found the problem,

> <https://github.com/arvydas/blinkstick-node/blob/master/blinkstick.js#L611>

At that line, there is an off-by one error that somehow messes up. Since I don’t know the gritty details, I can’t tell what is going on but removing the “-1” in the buffer.slice parameters fixed my problem

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