HANTEK DSO5102P Black screen

[imagineinspire]

Hello,

My name is Simo, just a new member here, 34 years old, I'm a senior engineer in IT Development, lover of iot stuff and electronics and I'm happy to join you're forum !

I just received my first Oscilloscope, the HANTEK DSO5102P, I wanted to do a self calibration, the oscilloscope freezes and the screen goes black, when I wanted to restart it,
the screen stays OFF and all the button lights are ON, waiting sometime removed the AC and turn on again, it worked, but about 10 min later when I was calibrating my probs when suddenly ( I pressed auto set ) the system complety freezes again with black screen, but it won't turn on again, the lights are still on.

Is there anything I can do the restore the firmware ? and how to do it without having access to the screen ?
it's very frustrating to have that experience with the very first time using a digital oscilloscope ... 

Thank you very much in advance and hope that I can also lean and help people around !

Cheers

there's the image attached

[jwet]

Welcome to the Forum.  I'll try to answer but what you've provided isn't very much.  Is the unit new or just new to you?  If its more than a few years old, a common problem is power integrity and power dropouts/ripple caused by either AC input caps, HV filter caps or output filter caps.  You can usually see problems with a close visual inspection.  Bad caps will bulge and often leak.  This is especially true of all large electrotytics- they have a limited life.  The other caps to insspect are X and Y caps that across the line and line to ground on modern equipment.  These are prone to failure especially certain brands like RIFA- notorious- replaced on sight.

As a software oriented guy, you might be assuming that its a firmware issue- this is possible but not so likely.  Get inside and get a good luck at the voltage rails- this is a great start.

Get a hold of a schematic and parts locator/board layout- a service manual would be the ultimate if available.

Do those checks and continue this thread, you'll have more responses and likely will quickly get led to a solution.

Welcome
John

[imagineinspire]

Hello !
Thank you for your swift answer.

I bought the Oscilloscope brand new, I just received it, because we don't have any supplier or representative here, and also the return will be too expensive,
I cannot do it ( I live in Morocco and it's very complicated to send it back ).

For the schematic, I just followed the PSU outputs and they seem to work perfectly. all voltages are good ( 3.3, 5, 8, 14, 12 ... ), I tried to follow the circuit until to FPGA, NAND, the USB, everything seems ok.
( when I plug it into the computer it shows unrecognized device ), I will inspect the caps after I'll take some rest.

By the way I do have the full schematic, I also contacted the support, they sent me a recovery file and the instructions to do it but nothing happens.

I'll inspect the caps and let you know !

Thank you very much.


PS : For people wanting the recovery files, I can send it to you with the SD burner.

Regards,
Simo

[jwet]

Simo, since the unit is brand new, a firmware improper load is more possible.  The one risk of reloading firmware is that you'd like to make sure the hardware is working because you could "brick" the unit if the hardware failed in the middle of a firmware upload.  Give yourself enough confidence that the unit will stay running long enough for a firmware load.  Before doing the firmware load, make sure its likely to complete.

Since you have a schematic- see if there are any voltages that are used only by the display.  There may also be a line for display brightness, etc that could be bad.  It may be that the scope is doing its job just not driving the display.  Does the vendor offer and PC interface software so you can verify that the system is working.

Another common problem on early failure is loose connections, etc.  Inspect the power connections to the display module and verify power at the display.  Inspect wiring harness and connectors for pinched wire or places where the pins in the connectors are misformed, pushed back etc.

Can you correlate the "lockups" to something specific. 

I will look online and see if there are any notes about your problem on other repair sites.  I found a site https://www.eediscuss.com/forum- that has multiple people experiencing problems similar to yours.  There are several solutions offered, have a look there.

Good Luck

[Adrian_Arg.]

perform this silly test, press the autoset button, if you hear the relay, it is most likely the screen

realiza esta prueba tonta, presiona el boton de autoset, si escuchas el rele,  muy posiblemente sea la pantalla

[imagineinspire]

Hello,

I don't think that the screen is the problem, the system is not responding at all, because basically the lights turns off after the boot, and just when I turn on the oscilloscope, the screen does have a kind of "flickering" that tells there is a voltage that has been applied, but it's turn of really fast after that, no response, I don't know because I red somewhere in the forum that some people faced the NAND  issue, but at the same time, even the recovery with the SD Card not worked at all, I tried with instructions from the support ( I had to put a jumper somewhere on the board ) with the card inserted but nothing happens, I have no clue what's going on...

For the scope, if it was doing it's job, it will be at least recognized by the PC, I when I click on autoset I should here a sound of the relay, which is not the case ( It shows unknown device even after installing the drivers )

UPDATE : just checked the voltages on the area of the screen, everything seems ok, and also checked all the connections, I don't know but maybe I have to desolder all electrolytic capacitors as Jwet suggested.

I think I just lost a 250$ and a lot of waiting time 

[jwet]

Simo,
If the unit is new or near new, its not the caps- don't bother.  Work through Hantek Support is my best advice.

[McMax]

Hi everyone, as this is my first post on this forum I want  to thank you for accepting me and for the great support you're all giving.
I have pretty much the same issue: my DSO5102P started to boot with a recovery screen about 1 year ago but then, after pressing F1 for reboting it was always starting. Now it's a week that I'm not able to boot it up anymore: it starts with the recovery menu but then the reboot or the recovery options are not working and I end up with a blank screen.
By reading about this issue here and there I guess it may be an issue related with the corrupted NAND.... but I may be wrog.
I wrote to Hantek support and waiting their feedback but, in the meatime would be great if Simo can send me the recovery files and the SD bruner - I assume I should use the internal SD slot right ?

Thanks for your help.

Max

[imagineinspire]

Hello,

For my part there were no resolve yet, hantek support doesn’t answer yet after they sent me the recovery file.
of course I can send you the recovery file and the burner, I’ll send it as soon as I am home.

Hope that I will solve you the issue, for my end, I am losing hopes… I think I’ll buy a new oscilloscope, I found the Rigol dso914 or the siglent sds814x interesting I don’t know if they’re good or not…

MAX, for the SD you have to use the SD slot in the board, after that you should set a jumper on p5, everything will be available on the instruction document.

[McMax]

Thanks Simo, much appreciated.
I noticed that the SD slot on the main board is mini-SD which is an adapter that I don't have and a pain in the backside to find... I'll figure out something.
I have another scope (Tek DPO5104) which is great but considering the very long boot time (windows 2000) and the power consumption which is in the range of a water heater  I normally tent to use the Hantek for the quick stuff leaving the Tek for the complex things...

Thanks,
Max