Author Topic: Siglent SDM 3055 Dark Display  (Read 146 times)

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Offline Joe510070

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Siglent SDM 3055 Dark Display
« on: Yesterday at 03:13:47 pm »
I have an SDM3055 I took a chance on and lost. I have a green power button light and a completely dark display.
On the main board I do have a solid green LED. According to the limited service manual I’ve found TP-1 to TP-3 voltages are good. I’m unsure where TP-86 references to, but to ground I’m seeing .6V not the 16V in the manual. I suspect I have the wrong point to measure from…
On the Analog Board all voltages T-1 to T-8 are good.
This unit does not have the SD slot on the main board, it’s unpopulated.
I’ve reached out to Siglent for support several times and have yet to get a response.
From my reading occasionally these units get corrupted firmware that needs to be reinstalled. I have no activity on a usb stick when plugged in, so I’d suspect the OS isn’t coming up… I also reseated all plugs and the ribbon cables.
I’d appreciate any suggestions to get this unit running again. Anyone know how to reinstall the firmware without an SD adapter on the board? Any other ideas?

Regards,
Joe

 

Online tautech

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Re: Siglent SDM 3055 Dark Display
« Reply #1 on: Yesterday at 09:25:12 pm »
Hmmm, later models omitted the MicroSD card socket on the MB as FW versions for them could use USB recovery if/when necessary. That yours doesn't get to the boot logo suggests some sort of other failure which is unusual IME.

Let's just see what Siglent NA comes back with once they get to your email.
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Offline Joe510070

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Re: Siglent SDM 3055 Dark Display
« Reply #2 on: Yesterday at 09:52:30 pm »
After doing some searching here, another user found a damaged ribbon cable when his showed the same problem. I’m a bit hesitant to pull that connector without knowing it’s specs and availability. I did go over the unit with a magnifier, everything looks perfect. Maybe the ribbon is damaged inside the socket…
Everything I’ve heard about Siglent is very positive, but this unit is clearly out of warranty. Hopefully they can help. Any suggestions would be most appreciated! I’ll let everyone know when I hear from them.
 

Online tautech

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  • Taupaki Technologies Ltd. NZ Siglent Distributor
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Re: Siglent SDM 3055 Dark Display
« Reply #3 on: Today at 12:44:32 am »
After doing some searching here, another user found a damaged ribbon cable when his showed the same problem. I’m a bit hesitant to pull that connector without knowing it’s specs and availability. I did go over the unit with a magnifier, everything looks perfect. Maybe the ribbon is damaged inside the socket…
Everything I’ve heard about Siglent is very positive, but this unit is clearly out of warranty. Hopefully they can help. Any suggestions would be most appreciated! I’ll let everyone know when I hear from them.
Yes if you have no display activity at all the display cable would be a good suspect.
If it's been removed and refitted there is a chance it hasn't been fully inserted and that's what I would investigate first.
You might also check if it's not just a backlight issue by shining a bright torch at the display once it's powered up.
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