>>> It now boots, but after about 4 or 5 secs it starts constantly rebooting,
>>> output below, along with board LEDs going fron steady green to red then
>>> green, then red then green etc. The reset button has no effect.
>>>
>>> At first I thought it was the power supply developed a problem, so I've
>>> tested with another PSU - same thing. I've disconnected everything
>>> and still same problem.
>>>
>>> Anybody any suggestions at all as to what I might check for? If I'm quick I
>>> can get maybe a couple of redboot commands executed, if anything will give
>>> any diagnostic info.
>
> ...snipped...
>>>
>>> RedBoot>
>>>
>>>>> TS-BOOTROM, Rev 1.02 - built 16:55:24, Sep 14 2004
>>>>> Copyright (C) 2004, Technologic Systems
>>>>> TS-7200: Rev A PLD detected, options ( MAX197-ADC )
>>>
>>>
>>>
>>>>> TS-BOOTROM, Rev 1.02 - built 16:55:24, Sep 14 2004
>>>>> Copyright (C) 2004, Technologic Systems
>>>>> TS-7200: Rev A PLD detected, options ( MAX197-ADC )
>>>
>>> ....repeated over and over
>>>
>> If it is rebooting whilst being held static at the reboot prompt, it must
>> be hardware. It definitely sounds like power brown-out triggering the
>> reboot.
>>
>> Can you monitor the output of the onboard regulator?
>
> Good point. I'll check.
>
> It's a bit wierd. After a quick power cycle it starts the constant reboot
> cycle after about 3 to 4 secs. If it is powered down for a while and then
> powered up. the reboot cycle starts after about 5 to 7 secs. It could be
> something heating up and failing.
>
> The 3.3v and 1.8v regulators are linear on the 7200, so will be
> dissipating heat.
Ok so grabbing some Freezer spray, and guess what spray the 1.8v reg. and
the beast works. So now I know what needs replacing. I've not done SM
repair before, but there's got to be a first time for everything - need a
finer solder tip etc.
Thanks Jacques
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