Printer is not turning on after a while

[Cloudy]

My printer was working fine before I went to vacation, when I came back I toggle the switch then nothing happens with a barely audible high pitch noise coming from somewhere inside.

No lights, no screen, no movement etc. but when I toggle the switch off, after few seconds screen starts flashing and I hear some step motor sound without movement then it stops. I tried couple times didn't help.

These are the photos of the board and power supply, no smoke, no blew caps, nothing noticable.

WhatsApp Image 2019-10-29 at 4.50.02 PM.jpeg (220.61 KiB) Viewed 17440 times

WhatsApp Image 2019-10-29 at 4.50.02 PM(3).jpeg (166.93 KiB) Viewed 17440 times

WhatsApp Image 2019-10-29 at 4.50.02 PM(2).jpeg (162.31 KiB) Viewed 17440 times

WhatsApp Image 2019-10-29 at 4.50.02 PM(1).jpeg (177.68 KiB) Viewed 17440 times

What should I do at this moment? Can you guys help

[Jarda3d]

unplug all cables from power supply and power it again. Measure voltage and if it is about 24V, then there are problem with mainboard.

Problem could be in electrolytic capacitor (new caps >2015 are very unreliable parts in general, ceramics >2018 too), but if you did not know what to do more, then rather think that board is bad.

[William]

Hi, your power box voltage needs to be adjusted to the voltage range you need.
Then you can measure whether the output voltage of the power supply is 24V.
When the printer is turned on normally, does the motherboard have three lights on?

V3 三灯亮起的位置.jpg (1.51 MiB) Viewed 17424 times

[Cloudy]

I checked the psu first, it's making a hiss noise and it got louder. It doesn't output any voltage, when I shut it down, led on the psu keeps lighting and after a little while, it outputs rapid voltages. I guess my power supply is dead.

24v psu's is not easy to find here and I don't want to buy second hand cheap psu. ATX power supplies are 12v so can I downgrade my printer to 12v? By the way I can't be sure about if board is okay cuz I don't have any 24v supply right now.

[William]

Hi, you can use a multimeter to measure the connector on the power connector position on the motherboard to measure whether there is 24V.

[Cloudy]

Hi, you can use a multimeter to measure the connector on the power connector position on the motherboard to measure whether there is 24V.

Hi, I already did that there's no power.

[William]

Hi, If so, you need to replace the power supply.
If you switch to a 12V power supply, you need to replace your accessories with the corresponding voltage range.

[Cloudy]

Hi, If so, you need to replace the power supply.
If you switch to a 12V power supply, you need to replace your accessories with the corresponding voltage range.

Can you help me about it? I don't exactly know which parts I should change. And do you think it would be bad cuz people says 24v is better, heating time is not important for me I'm just curious about the printing performance and I'm planning on switching to TMC2208 drivers.

[William]

Hi, If so, you need to replace the power supply.
If you switch to a 12V power supply, you need to replace your accessories with the corresponding voltage range.

Can you help me about it? I don't exactly know which parts I should change. And do you think it would be bad cuz people says 24v is better, heating time is not important for me I'm just curious about the printing performance and I'm planning on switching to TMC2208 drivers.

Hi, you are using the A20M's output voltage and the motherboard is 24V.
If you pass your test and determine that it is a power problem,
The power supply can be replaced.

[Cloudy]

Hi, If so, you need to replace the power supply.
If you switch to a 12V power supply, you need to replace your accessories with the corresponding voltage range.

Can you help me about it? I don't exactly know which parts I should change. And do you think it would be bad cuz people says 24v is better, heating time is not important for me I'm just curious about the printing performance and I'm planning on switching to TMC2208 drivers.

Hi, you are using the A20M's output voltage and the motherboard is 24V.
If you pass your test and determine that it is a power problem,
The power supply can be replaced.

I just got my replacement powersupply from geeetech and installed it. My printer works now thanks. Btw, the new psu they sent is MeanWell which is a lot better brand than the old psu.