Lecroy Wavesurfer 3054 (boot Loop)

[jc81382]

Hey Everyone,

I have a Lecroy 3054 that seems to be stuck in a boot loop...

The logo starts up, flashes 3 times (about 30 sec for this to happen), then the screen flashes 3 times (another 30 sec), then blue screen.

Opened it up and all components seem secure.

Any ideas? Maybe a corrupt OS?

[analogRF]

were you able to fix this scope?

[figgie]

...
The logo starts up, flashes 3 times (about 30 sec for this to happen), then the screen flashes 3 times (another 30 sec), then blue screen.

A blue screen as the infamous Windows Blue screen of Death? If so the blue screen will tell you what is actually failing (driver.sys, or somethingelse.dll etc). That will lead you to what is causing the issue.

Ie a video driver will usually point to a corrupt vid card driver.

[analogRF]

...
The logo starts up, flashes 3 times (about 30 sec for this to happen), then the screen flashes 3 times (another 30 sec), then blue screen.

A blue screen as the infamous Windows Blue screen of Death? If so the blue screen will tell you what is actually failing (driver.sys, or somethingelse.dll etc). That will lead you to what is causing the issue.

Ie a video driver will usually point to a corrupt vid card driver.

no there is no BSOD. This is WinCE based scope. Has no hard drive. One BIGG single board scope made by Siglent (Siglent logo on the back of the board!)
Right after power-on the Teledyne LEcroy logo shows up and then flickers on-off a couple of times and after that just a blank screen (purple backlight) keeps coming on and off forever like it is rebooting but not from the logo screen anymore

I have checked all supply voltages ...

EDIT: there is no BIOS chip. In fact there is only one nand flash (4Gbit) on the board which also has LPDDR memory integrated in it (also 4Gbit)
I dont know the CPU as a heatsink is glued to it. There are tons of SPARTAN-6 FPGAs and each have bunch of DDR2/3 memories but those are in the acquisition area and I am pretty sure at this stage they dont have anything with the initial booting

[m k]

My guess is a corrupted OS.

At the beginning the OS is loaded somehow.
Any promising connectors?

[2N3055]

Did you see this?

https://www.eevblog.com/forum/repair/lecroy-wavesurfer-3024-fail-to-boot/msg4846916/#msg4846916

[analogRF]

Did you see this?

https://www.eevblog.com/forum/repair/lecroy-wavesurfer-3024-fail-to-boot/msg4846916/#msg4846916

no I had not!!! and I just recovered the scope 
Thank you so much for pointing me to this

[2N3055]

Did you see this?

https://www.eevblog.com/forum/repair/lecroy-wavesurfer-3024-fail-to-boot/msg4846916/#msg4846916

no I had not!!! and I just recovered the scope 
Thank you so much for pointing me to this

Excellent!!! Congrats! My pleasure!!

[analogRF]

My guess is a corrupted OS.

At the beginning the OS is loaded somehow.
Any promising connectors?

There are tons of connectors but I was not able to detect any activity on them
I must have missed something because Ollopa has posted serial console stream in the other thread.

[analogRF]

I just recovered my WS3024 thanks to the recovery SD card image posted by kendor in the other thread for WS3024

After the recovery I did NOT install the included 9.6.01 but I got the 9.2.0.5 from lecroy and upgraded with that and then the so-called BIOS upgrade
all went ok
However now I have a problem.
As you see in the picture all 4 traces have a red line overlay on them and at higher V/div when noise is not visible and trace becomes thin the red line
completely masks the color of trace so they all look red!! 
unless I STOP the trigger then I can see the actual colors

has anyone seen this problem? there is no place to get rid of that thing. Right after recovery with 8.4.1.5 it looked OK

[2N3055]

I just recovered my WS3024 thanks to the recovery SD card image posted by kendor in the other thread for WS3024

After the recovery I did NOT install the included 9.6.01 but I got the 9.2.0.5 from lecroy and upgraded with that and then the so-called BIOS upgrade
all went ok
However now I have a problem.
As you see in the picture all 4 traces have a red line overlay on them and at higher V/div when noise is not visible and trace becomes thin the red line
completely masks the color of trace so they all look red!! 
unless I STOP the trigger then I can see the actual colors

has anyone seen this problem? there is no place to get rid of that thing. Right after recovery with 8.4.1.5 it looked OK

Did you try to reset the scope to factory default settings?
Those look like some kind of color grading persistence mode...

[analogRF]

yes. I did default setup but it is still there...very annoying...scope works fine but I have 4 red traces!!

in the short time i had 8.4.1.5 after recovery it looked just fine. It happened after installing 9.2.0.1 and the so-called BIOS update
actually now I think even 9.2.0.1 was ok it probably happened after that BIOS update thing (not 100% about this)

[analogRF]

Problem fixed 
I just reloaded 9.2.0.5 two more times and the problem went away.

I suspect having a sd card inserted at the back interfered with updates...Eventhough the software was updated and showed 9.2.0.5 but
I was getting that nasty traces. The last time I tried the the same update I took out the SD card (which I just remembered was there)
and this time unit came back as expected although there was no change in the update process or messages.
weird stuff but seems to be working fine now 

[tautech]

Problem fixed 
I just reloaded 9.2.0.5 two more times and the problem went away.

I suspect having a sd card inserted at the back interfered with updates...Eventhough the software was updated and showed 9.2.0.5 but
I was getting that nasty traces. The last time I tried the the same update I took out the SD card (which I just remembered was there)
and this time unit came back as expected although there was no change in the update process or messages.
weird stuff but seems to be working fine now 

Yeah well a recovery package on the SD card that runs each time you boot would do that, it's not interfering but running at each boot as it should.
Lesson = once the instrument is recovered remove the recovery media.

[analogRF]

Problem fixed 
I just reloaded 9.2.0.5 two more times and the problem went away.

I suspect having a sd card inserted at the back interfered with updates...Eventhough the software was updated and showed 9.2.0.5 but
I was getting that nasty traces. The last time I tried the the same update I took out the SD card (which I just remembered was there)
and this time unit came back as expected although there was no change in the update process or messages.
weird stuff but seems to be working fine now 

Yeah well a recovery package on the SD card that runs each time you boot would do that, it's not interfering but running at each boot as it should.
Lesson = once the instrument is recovered remove the recovery media.

but I dont think it was doing recovery each time because the behavior was not the same as during recovery and also the software did change to 9.2.0.5.
The recovery package installs 8.4.1.5. If it had change it back to 8.4.1.5 each time I rebooted I would have noticed it earlier.
But yes in the end you must not forget to take the SD card out right after recovery before doing anything else