New Rigol dho804 oscillocope

I use  the power adaptor provided in the accessories box and I connect it to the AC power source (220 V, 50 Hz ).

michaelkellett  Ok, thank you. Do you know which the Back button in the front panel that Rigol service mean

It's not clear in the 924s manual but I think they might mean this key:

MK

This one

Do you know how to ubdate scope firmware, I download the file from Rigol site "" rel="noopener noreferrer nofollow" target="_blank" data-e14adj="t">supportint.rigol.com/.../software-firmware-download.html"

It looks to me as if the scope must be working to update the firmware - you put the new code on a USB stick, plug into the scope and open the file. Which means you need to have it working well enough to work the disk management functions.

There is a .pdf file (which may have cold boot instructions) at the link you gave me but it won't let me look at it (no password) but you might be able to look.

There are some more ideas here:

www.eevblog.com/.../

MK

Nope.  He has a 15V 3A PD supply (so could supply different voltages) but the manual he is reading says he needs 12V 4A.

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Yes, sorry, you are right, it does both.  The scope manual he is referring to says it needs 4A at 12V; a newer version of the manual says the scope needs 3A at 15V.  Either way, 12V/3A is not the right supply power.

Yeh....especially during the startup tests which might explain why it gets so far and then restarts.  It's quite a slow startup machine from what I can see.

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I send email include the photo of power adapter to Rigol service, But he didn't mention that the problem is charger he said that the problem is software. "

• Press the power button and quickly press the BACK button on the front panel multiple times. This may reset any incorrect settings.
• Alternatively, place the latest firmware on a FAT32 USB drive, power on the device, and follow the on-screen prompts to upgrade the firmware.

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Not yet, I will try to do that