Re: Odd PSU problem
Paul <[email protected]>
| Newsgroups | alt.comp.hardware |
|---|---|
| Organization | A noiseless patient Spider |
| Message-ID | <[email protected]> |
philo wrote:
> On 9/30/20 8:27 PM, philo wrote:
>> On 9/29/20 8:53 PM, Paul wrote:
>>> philo wrote:
>
>
> <snip>
>>
>>
>> I've been using the 20 pin tester simply to weed out 100% dead supplies.
>>
>>
>> On a good 24 pin supply there is always one LED not lit and thus it
>> shows an overall failure.
>>
>> Until recently that has proven good enough.
>>
>> For peace of mind, next time I place an order to NewEgg, I''l get a 24
>> pin tester.
>>
>>
>> Building and repairing very few computers now days...
>> used to be three a week.
>>
>
> Had a look at the 24 pin PSU
>
>
> no -5 volt at all
>
>
> That is what triggers the 20 pin tester to show fault
I have a cable made up with a 7905 running off -12V
joined to it. This makes a "fake" -5V to "fool" whatever
gets in your way. The adapter currently sits in my Asus P2B-S
from year 2000 or so. (The Asus board measures and complains
about -5V, but nothing on the board uses it. Kooky.)
It's not designed to supply a lot of current - the faking
circuit is just there to make a voltage value, to shut up
complaints.
Paul