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[Problems with 3 Aeroflex 2975]

This forum exists for the purposes for discussing service monitors (This includes but is not limited to Motorola, HP, Aeroflex, GD, etc). Additional topics allowed include test procedures, interpretation of test results, where to find information about specific tests, antenna VSWR, return loss testing, duplexer and filter alignment, etc.

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edacsmaster
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[Problems with 3 Aeroflex 2975]

Postby edacsmaster » Thu Sep 21, 2017 10:42 am

what are the odds?
I have 3 aeroflex 2975, all3 power up and i can hear the fan running,
none of the 3 get to the boot stage not a single beep.
could this be that all 3 have a bad hard drive, or controller?
than any one who could give any ideas
JC


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Audiotron
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Re: [Problems with 3 Aeroflex 2975]

Postby Audiotron » Thu Sep 21, 2017 6:45 pm

HI ,

Try turning off the drives hdd to see if there is a Bios startup screen..

Regards.

edacsmaster
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Re: [Problems with 3 Aeroflex 2975]

Postby edacsmaster » Fri Sep 22, 2017 3:12 pm

Audiotron,

Ok I got all 3 on the bench with the cover removed, you say to disconnect power from the HDto see if i can get to the bios correct?
I have not tried this yet,
But i will say that I did plug a key board to the usb port, hold down the power button on the front and then turned on the main power button and i got to the bios screen.even heard the floppy drive spin up had leave so i powered down, came back next day did the same sequence but now just blank screen,
was thinking that may be i can make a boot disk to do boot from floppy, but no luck finding a floppy, i will say that I can see that the CPU cooling fan is running, being that I have 3 all doing the same thing, something here is common failure
wish there was a tech manual out there.
will try your method on Monday
thank you
JC

Audiotron
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Re: [Problems with 3 Aeroflex 2975]

Postby Audiotron » Sat Sep 23, 2017 5:43 pm

Hi JC ,

In these units 2975 there are important points to check, first check the Bios Battery, according to whether the RTC unit is perfect and a very important detail and check if the HDD has no damaged sector to do so use the DDrescue of LInux

Regards

Audiotron
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Re: [Problems with 3 Aeroflex 2975]

Postby Audiotron » Tue Sep 26, 2017 5:10 am

Hi ,

first make sure that you have a bootable 2975, then with the help of a PC and the DDrescue software try to recover the errors from the HDD using this software

Audiotron
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Re: [Problems with 3 Aeroflex 2975]

Postby Audiotron » Fri Sep 29, 2017 3:21 pm

Hi

I recovered some logic boards of this model and some had faults in the Vcore voltage electrolytic capacitors and others in the PWM oscillator of the processor voltages plus what is very common in this unit really are HDD failures.


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