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 Post subject: Maxtor D740X-6L suddenly died, only LED blinks 5 times
PostPosted: July 22nd, 2022, 14:51 
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Joined: July 17th, 2022, 13:26
Posts: 30
Location: Slovakia
Maxtor D740X-6L (Quantum-based) in my test system suddenly died. It does not spin up, activity LED on the PCB blinks 5 times (then pause and repeats). What does it mean? Flash corruption?


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 Post subject: Re: Maxtor D740X-6L suddenly died, only LED blinks 5 times
PostPosted: July 22nd, 2022, 15:17 
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Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
Have a look here:

https://www.acelab.ru/dep.pc/otherproducts.php

I believe this model has a UART port which outputs diagnostic information.

If you upload a photo of the PCB, I can help you identify the voltage test points, if necessary.

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 Post subject: Re: Maxtor D740X-6L suddenly died, only LED blinks 5 times
PostPosted: July 22nd, 2022, 15:40 
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Joined: September 8th, 2009, 18:21
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Location: Australia
This might help (different model):

https://forum.hddguru.com/viewtopic.php?f=1&t=28367

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 Post subject: Re: Maxtor D740X-6L suddenly died, only LED blinks 5 times
PostPosted: July 22nd, 2022, 17:00 
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Joined: July 17th, 2022, 13:26
Posts: 30
Location: Slovakia
Thanks. When it didn't work, I've checked some voltages - found 5V and 12V (of course), then 3.3V and something like 1.9V. Then I touched the RAM or CPU and it started to work. I've copied everything to another HDD. Now I have to wait until it fails again...


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 Post subject: Re: Maxtor D740X-6L suddenly died, only LED blinks 5 times
PostPosted: July 22nd, 2022, 17:39 
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Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
See page 26:

https://www.acelab.ru/dep.pc/doc.pc3000dos/060713.001/Quantum_EL-AS_v3.pdf

There appear to be two linear regulators -- 3.3V, 1.7V. There also appears to be a switchmode regulator, presumably to generate the -5V (?) supply for the preamp.

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 Post subject: Re: Maxtor D740X-6L suddenly died, only LED blinks 5 times
PostPosted: September 17th, 2022, 11:12 
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Joined: July 17th, 2022, 13:26
Posts: 30
Location: Slovakia
It failed again. And came back to life after touching RAM and power cycling. And failed again after a while as it heated up. Resoldered RAM and no more failures since then.


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