<p>Reboots happen in 2 cases on a printer:</p>
<ul>
<li>If the board power has been below a the operational threshold (~3 V) and the capacitors on the board are empty, the power dip can result in a reboot.</li>
<li>If a device connects to the serial-USB port, it reboots.</li>
</ul>
<p>If you power up the printer not connected to any other device, it should run continuously. If it flickers and reboots, the power-lines to the board or the PSU are bad. Check those in reverse.</p>
<p>If it only reboots again and again when connected to a serial port (PC, Octoprint etc), your problem is the cable - it might be jiggling or be defective, or otherwise de- and re-connect again and again.</p>

CC BY-SA 4.0
2020-12-12T12:05:05.207Z
2020-12-12T12:05:05.207Z
Trish
<p>My Anet A8 Plus worked normally, but after the weekend and changing for new bearings on the rods, it is not working anymore at all.</p>
<p>I experience random reboots, the nozzle can only heat to about 10 °C away from the target and then starts to drop, the printer gives the halted error.</p>
<p>Example: Target is 240 °C, the nozzle temperature goes to like 232 °C and then starts to drop pretty fast. The Bed heats good otherwise.</p>
<h1>troubleshooting so far</h1>
<p>The PSU gives 24 V and the supply voltage switch is 220 V like it should. No matter if I try print it through OctoPrint or Cura, the same thing happens.</p>
<p>How it can break this bad just from replacing a few bearings is not clear to me. Do these reboots mean the PSU is dead and not giving constant voltage? Reboots come even idle or just bed heating etc.</p>

<marlin><anet-a8>
Printer halted! Psu dead?
Getcarried
# Printer halted! Psu dead?

(Asked by: username_0 on 2020-12-11)

My Anet A8 Plus worked normally, but after the weekend and changing for new bearings on the rods, it is not working anymore at all.

I experience random reboots, the nozzle can only heat to about 10 °C away from the target and then starts to drop, the printer gives the halted error.

Example: Target is 240 °C, the nozzle temperature goes to like 232 °C and then starts to drop pretty fast. The Bed heats good otherwise.

# troubleshooting so far

The PSU gives 24 V and the supply voltage switch is 220 V like it should. No matter if I try print it through OctoPrint or Cura, the same thing happens.

How it can break this bad just from replacing a few bearings is not clear to me. Do these reboots mean the PSU is dead and not giving constant voltage? Reboots come even idle or just bed heating etc.

**Tags:** marlin, anet-a8


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## 1 answers

### Answer by username_1 on 2020-12-12. Score: 1

Reboots happen in 2 cases on a printer:

* If the board power has been below a the operational threshold (~3 V) and the capacitors on the board are empty, the power dip can result in a reboot.
* If a device connects to the serial-USB port, it reboots.

If you power up the printer not connected to any other device, it should run continuously. If it flickers and reboots, the power-lines to the board or the PSU are bad. Check those in reverse.

If it only reboots again and again when connected to a serial port (PC, Octoprint etc), your problem is the cable - it might be jiggling or be defective, or otherwise de- and re-connect again and again.


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