Synth-DIY Yahoo! Groups Archives

Thread

MP-7 Locked up?

2009-10-29 by Ivan Chaparro

Just purchased an MP-7 used for parts and was surprised at how good  
the condition was. The issue is that it does not boot fully. At power  
up the unit lights up all buttons and display but stays lit with a  
black bar across display. Opened up and secured all ribbon connectors   
and checked fuse, no luck. Also will not respond to the diagnostic  
boot up. Any idea?

Re: [xl7] MP-7 Locked up?

2009-10-30 by Atom Smasher

On Thu, 29 Oct 2009, Ivan Chaparro wrote:

> Just purchased an MP-7 used for parts and was surprised at how good the 
> condition was. The issue is that it does not boot fully. At power up the 
> unit lights up all buttons and display but stays lit with a black bar 
> across display. Opened up and secured all ribbon connectors and checked 
> fuse, no luck. Also will not respond to the diagnostic boot up. Any 
> idea?
=============

re-seat the chips?

failing that, swap out parts with a good unit until you can isolate a bad 
part.


-- 
         ...atom

  ________________________
  http://atom.smasher.org/
  762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
  -------------------------------------------------

 	"Never have the armies of the North brought peace,
 	 prosperity, or democracy to the peoples of Asia,
 	 Africa, or Latin America. In the future, as in the
 	 past five centuries, they can only bring to these
 	 peoples further servitude, the exploitation of their
 	 labor, the expropriation of their riches, and the denial
 	 of their rights. It is of the utmost importance that the
 	 progressive forces of the West understand this."
 		-- Samir Amin,
 		director of Forum du Tiers Monde in Dakar, Senegal

Re: [xl7] MP-7 Locked up?

2009-10-30 by Ivan Chaparro

did that, I guess I could swap parts was hoping for a less invasive  
solution.
On Oct 29, 2009, at 7:23 PM, Atom Smasher wrote:

> On Thu, 29 Oct 2009, Ivan Chaparro wrote:
>
> > Just purchased an MP-7 used for parts and was surprised at how  
> good the
> > condition was. The issue is that it does not boot fully. At power  
> up the
> > unit lights up all buttons and display but stays lit with a black  
> bar
> > across display. Opened up and secured all ribbon connectors and  
> checked
> > fuse, no luck. Also will not respond to the diagnostic boot up. Any
> > idea?
> =============
>
> re-seat the chips?
>
> failing that, swap out parts with a good unit until you can isolate  
> a bad
> part.
>
> -- 
> ...atom
>
> ________________________
> http://atom.smasher.org/
> 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
> -------------------------------------------------
>
> "Never have the armies of the North brought peace,
> prosperity, or democracy to the peoples of Asia,
> Africa, or Latin America. In the future, as in the
> past five centuries, they can only bring to these
> peoples further servitude, the exploitation of their
> labor, the expropriation of their riches, and the denial
> of their rights. It is of the utmost importance that the
> progressive forces of the West understand this."
> -- Samir Amin,
> director of Forum du Tiers Monde in Dakar, Senegal
>
>

Perhaps the first line of attack should be to reinstall the system software (incase it failed to load properly last time resulting in the behaviour you see). That shouldn't take long may distinguish between a hardware and a software problem...

From: Ivan Chaparro
To: xl7@yahoogroups.com
Sent: Fri, October 30, 2009 10:39:35 AM
Subject: Re: [xl7] MP-7 Locked up?

did that, I guess I could swap parts was hoping for a less invasive solution.

On Oct 29, 2009, at 7:23 PM, Atom Smasher wrote:

On Thu, 29 Oct 2009, Ivan Chaparro wrote:

> Just purchased an MP-7 used for parts and was surprised at how good the
> condition was. The issue is that it does not boot fully. At power up the
> unit lights up all buttons and display but stays lit with a black bar
> across display. Opened up and secured all ribbon connectors and checked
> fuse, no luck. Also will not respond to the diagnostic boot up. Any
> idea?
============ =

re-seat the chips?

failing that, swap out parts with a good unit until you can isolate a bad
part.

--
...atom

____________ _________ ___
http://atom. smasher.org/
762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
------------ --------- --------- --------- --------- -

"Never have the armies of the North brought peace,
prosperity, or democracy to the peoples of Asia,
Africa, or Latin America. In the future, as in the
past five centuries, they can only bring to these
peoples further servitude, the exploitation of their
labor, the expropriation of their riches, and the denial
of their rights. It is of the utmost importance that the
progressive forces of the West understand this."
-- Samir Amin,
director of Forum du Tiers Monde in Dakar, Senegal

Re: [xl7] MP-7 Locked up?

2009-10-30 by Atom Smasher

On Thu, 29 Oct 2009, Jack Pratt wrote:

> Perhaps the first line of attack should be to reinstall the system 
> software (incase it failed to load properly last time resulting in the 
> behaviour you see). That shouldn't take long may distinguish between a 
> hardware and a software problem...
===========

is there any version of the system software that can be loaded if it's 
bricked?


-- 
         ...atom

  ________________________
  http://atom.smasher.org/
  762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
  -------------------------------------------------

 	"So what do we do if we get bitten by something deadly, then?"
 	 He blinked at me as if I was stupid.
 	 "Well what do you think you do?" he said. "You die of course.
 	 That's what deadly means."
 		-- Douglas Adams, Last Chance To See

Re: [xl7] MP-7 Locked up?

2009-10-30 by Ivan Chaparro

sure but it wont boot. how would I reinstall?
On Oct 29, 2009, at 8:02 PM, Jack Pratt wrote:

>
> Perhaps the first line of attack should be to reinstall the system  
> software (incase it failed to load properly last time resulting in  
> the behaviour you see). That shouldn't take long may distinguish  
> between a hardware and a software problem...
>
> From: Ivan Chaparro <jibarosoul@...>
> To: xl7@yahoogroups.com
> Sent: Fri, October 30, 2009 10:39:35 AM
> Subject: Re: [xl7] MP-7 Locked up?
>
>
> did that, I guess I could swap parts was hoping for a less invasive  
> solution.
> On Oct 29, 2009, at 7:23 PM, Atom Smasher wrote:
>
>>
>> On Thu, 29 Oct 2009, Ivan Chaparro wrote:
>>
>> > Just purchased an MP-7 used for parts and was surprised at how  
>> good the
>> > condition was. The issue is that it does not boot fully. At power  
>> up the
>> > unit lights up all buttons and display but stays lit with a black  
>> bar
>> > across display. Opened up and secured all ribbon connectors and  
>> checked
>> > fuse, no luck. Also will not respond to the diagnostic boot up. Any
>> > idea?
>> ============ =
>>
>> re-seat the chips?
>>
>> failing that, swap out parts with a good unit until you can isolate  
>> a bad
>> part.
>>
>> -- 
>> ...atom
>>
>> ____________ _________ ___
>> http://atom. smasher.org/
>> 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
>> ------------ --------- --------- --------- --------- -
>>
>> "Never have the armies of the North brought peace,
>> prosperity, or democracy to the peoples of Asia,
>> Africa, or Latin America. In the future, as in the
>> past five centuries, they can only bring to these
>> peoples further servitude, the exploitation of their
>> labor, the expropriation of their riches, and the denial
>> of their rights. It is of the utmost importance that the
>> progressive forces of the West understand this."
>> -- Samir Amin,
>> director of Forum du Tiers Monde in Dakar, Senegal
>>
>>
>
> =
>
>
>

Re: [xl7] MP-7 Locked up?

2009-10-31 by Jack Pratt

Actually it probably does boot but won't run the application unless the problem is a fundamental hardware one and the MP7 is only good for the spare parts (knobs really). If the bootloader itself is dead then you'd have to replace the motherboard FLASH that contains the bootloader with one from another board (alternatively you could reprogram it through the BDM interface but that's getting rather technical).

Ultimately the problem is either hardware or software.

If it is software then its either bootloader or application..

If it is bootloader, the bootloader must be reFLASH'ed or the FLASH replaced with another one that works. [bootloaders are not meant to be replaced - they just work]

If it is the application then you can probably get to the bootloader and reFLASH the application. Try following the software upgrade procedure and see if it works. It doesn't take long and you could get lucky.

If it is a hardware problem you'd probably need considerable technical expertise (and equipment) to diagnose and fix the problem. If you have some technical ability check the rails from the power supply as the first start down that path, and check the microprocessor clock and reset signal as the second. There really is not alot you're going to be able to do without a soldering iron but if you can isolate/identify the problem you may be able to fix it.

You also have to consider why the problem arose in the first place and whether it might happen again (before you put too much effort in). The most likely hardware problem (IMHO) is a power supply fault with one of the rails missing or low, possibly as the result of a power surge or ground current loop. If you have an alternate power supply handy you will know very quickly. Problem is that any surge might have propagated through the wetire system and it may never work properly.

From: Ivan Chaparro
To: xl7@yahoogroups.com
Sent: Fri, October 30, 2009 11:44:48 AM
Subject: Re: [xl7] MP-7 Locked up?

sure but it wont boot. how would I reinstall?

On Oct 29, 2009, at 8:02 PM, Jack Pratt wrote:

Perhaps the first line of attack should be to reinstall the system software (incase it failed to load properly last time resulting in the behaviour you see). That shouldn't take long may distinguish between a hardware and a software problem...

From: Ivan Chaparro
To: xl7@yahoogroups. com
Sent: Fri, October 30, 2009 10:39:35 AM
Subject: Re: [xl7] MP-7 Locked up?

did that, I guess I could swap parts was hoping for a less invasive solution.

On Oct 29, 2009, at 7:23 PM, Atom Smasher wrote:

On Thu, 29 Oct 2009, Ivan Chaparro wrote:

> Just purchased an MP-7 used for parts and was surprised at how good the
> condition was. The issue is that it does not boot fully. At power up the
> unit lights up all buttons and display but stays lit with a black bar
> across display. Opened up and secured all ribbon connectors and checked
> fuse, no luck. Also will not respond to the diagnostic boot up. Any
> idea?
============ =

re-seat the chips?

failing that, swap out parts with a good unit until you can isolate a bad
part.

--
...atom

____________ _________ ___
http://atom. smasher.org/
762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
------------ --------- --------- --------- --------- -

"Never have the armies of the North brought peace,
prosperity, or democracy to the peoples of Asia,
Africa, or Latin America. In the future, as in the
past five centuries, they can only bring to these
peoples further servitude, the exploitation of their
labor, the expropriation of their riches, and the denial
of their rights. It is of the utmost importance that the
progressive forces of the West understand this."
-- Samir Amin,
director of Forum du Tiers Monde in Dakar, Senegal

=