# TAZ-4 - Won't Power On **URL:** \ **Category:** LulzBot TAZ\ **Created:** [July 21, 2014, 4:01pm UTC](https://forum.lulzbot.com/t/taz-4-wont-power-on/706 "2014-07-21T16:01:46Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![debbiec](https://avatars.discourse-cdn.com/v4/letter/d/919ad9/32.png) [@debbiec](https://forum.lulzbot.com/u/debbiec)\ **Post date:** [July 21, 2014, 4:01pm UTC](https://forum.lulzbot.com/t/taz-4-wont-power-on/706/1 "2014-07-21T16:01:46Z")
my taz-4 machine lost power suddenly when I was removing the nozzle for cleaning. I had left the heatend on at 100C to soften the PLA so I could unscrew the nozzle. I noticed that during the removal of the nozzle, the machine lost power. After cleaning the nozzle and screwing it back in, I noticed that the machine no longer powers on. I am getting power to the converter box (green light on) but I have not checked if the machine is receiving power. Could I have blown out some wiring and fried the board? The machine is only a week old! ---
**Author:** ![Orias](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/orias/32/3_2.png) [@Orias](https://forum.lulzbot.com/u/Orias)\ **Post date:** [July 22, 2014, 7:53pm UTC](https://forum.lulzbot.com/t/taz-4-wont-power-on/706/2 "2014-07-22T19:53:49Z")
You may have blown a fuse on the RAMBo board. There are three fuses, the large blue automotive type fuse, and the two rectangular polyfuses. They can be found here: [http://reprap.org/wiki/Rambo\_v1.2#Fuses](http://reprap.org/wiki/Rambo_v1.2#Fuses) Use a multimeter if you have one sent to measure continuity or resistance to examine the two fuses. If you don’t have access to a multimeter, contact support at [Support@LulzBot.com](mailto:Support@LulzBot.com) for more assistance with your order number, 3d printer serial number and contact information. You’ll be printing soon! Thanks! ---
**Author:** ![rufu5](https://avatars.discourse-cdn.com/v4/letter/r/f14d63/32.png) [@rufu5](https://forum.lulzbot.com/u/rufu5)\ **Post date:** [July 29, 2014, 12:37pm UTC](https://forum.lulzbot.com/t/taz-4-wont-power-on/706/3 "2014-07-29T12:37:43Z")
It might be a power supply issue. Can you check if the power supply is outputting 24V with a multimeter? It it is the power supply, it would be an easy fix compared to opening up the electronics enclosure.