Electronics > Repair

Tektronix DPO 4104 kernel panic

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aibi1590:
Hey I got one mso2012 and a white screen appears.
I watch the ubootlog and stop at DRAM:64MB
I infer that the flash is faulty.

adrianh:
That looks basically identical to pcwrangler's failure. I'm curious how his DRAM experiment will turn out...

aibi1590:

--- Quote from: adrianh on October 07, 2021, 10:04:12 pm ---That looks basically identical to pcwrangler's failure. I'm curious how his DRAM experiment will turn out...

--- End quote ---
Yes, but I don't know if it is DRAM or flash failure.
The four DRAMs on my MSO2012 are not the same.
And I don’t think I can buy a new flash and pre-burn the firmware into it.

pcwrangler:
SUCCESS! I replaced the DRAM and it came right up. I can't thank Adrian enough for the support on this. Although only 2 confirmed cases is anecdotal so far, Adrian might be right; these scopes could have faulty DRAM. I hope more people see this thread.

aibi1590, your bootlog stops almost exactly where mine did. Even though your version is 2000 series, I would still bet the RAM is bad. Give it a try, the cost is minimal.


Now...... where did I put all those screws?!

pcwrangler:
For the record: The bad ram was the bottom one on the back side (opposite of CPU) of the board.

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