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Re: Flakey Video Output

Cross-posted to 2 groups.

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On 9/30/2023 1:10 PM, RabidPedagog wrote:
> On 2023-09-30 2:06 p.m., Physfitfreak wrote:
>> On 9/29/2023 11:29 PM, Physfitfreak wrote:
>>> On 9/29/2023 10:45 PM, Rockinghorse Winner wrote:
>>>> On 2023-09-29, Physfitfreak <Physfitfreak@gmail.com> wrote:
>>>>>
>>>>> When I turn one of my computers on, the video output is sometimes not
>>>>> there, and sometimes is. Computer always boots up normally, making the
>>>>> introductory sound of windows coming up, etc. But it is exactly like
>>>>> there's no monitor attached. It's not the cable or monitor. That much
>>>>> I've tested.
>>>>>
>>>>> And on some other occasions the screen appears normally when I turn 
>>>>> the
>>>>> computer on, and if I keep turning the computer off and then on screen
>>>>> always appears. On occasions that it won't come up, no matter how many
>>>>> times I turn the computer off and on, screen won't come up.
>>>>>
>>>>> What could it be? Bios? Graphics card? The round 3 volt button 
>>>>> battery?
>>>>> The electronics on MB itself? Anything like that anybody here
>>>>> experienced? This is the first for me. It can't be virus cause that
>>>>> computer is hermetically isolated from internet.
>>>>>
>>>>> I tested the battery, it is still at least 3 volts. Should it be 5 
>>>>> volts?
>>>>>
>>>>>
>>>>>
>>>>
>>>> Def sounds hardware related. But maybe not.
>>>>
>>>
>>>
>>> Strange about it is that when it happens, farther turning it off and 
>>> on does not work. I have to come to the computer next day, then it 
>>> would sometime work no matter how many time I turn it off and on. A 
>>> heating problem perhaps, requiring hours to cool? Or a charge 
>>> accumulation somewhere requiring several hours to dissipate? I've 
>>> never had this problem before.
>>>
>>> Two years back it once acted like this but just for one occasion. 
>>> Then never happened till some 10 days back and this time it has kind 
>>> of stayed like that.
>>
>>
>> Ok, I think I have found a pattern. Every time when I'm done and turn 
>> the computer off _and_ turn the electricity off to the entire set 
>> (computer, monitor, speakers, surge protector), 24 hours later the 
>> system will turn on normally after I connect the electricity to the 
>> system. But, now I'm pretty sure, when I leave the electricity to the 
>> system on after turning the computer off, then 24 hours later the 
>> video signals to the monitor is absent after turning the computer on.
>>
>> By now, I have conducted multiple tests on both scenarios mentioned 
>> above, carefully observing the behavior.
>>
>> So definitely something accumulates either heat or charge when 
>> electricity stays connected to the turned off system. What could that be?
> 
> I actually have a similar problem with my Zephyrus G14 laptop. There's a 
> fingerprint sensor on it and the hardware will fail in certain 
> circumstances. If the connector is already attached to the laptop and I 
> plug the unit to the power plug, it will short the sensor. No fiddling 
> around in the Device Manager will do anything to restore functionality, 
> and I have to disable the sensor in the BIOS, then re-enable it and 
> restart. However, if I plug the power adapter first and plug the 
> connector to the unit after, everything works as expected.
> 

Weird. Some residual current between computer and power adapter might be 
continuing after unplugging from wall, causing this. But at least time 
is not a factor in your case. In my case, I have to wait 24 hours each 
time to see any change of behavior.

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Flakey Video Output Physfitfreak <Physfitfreak@gmail.com> - 2023-09-28 19:20 -0500
  Your motherboard is shot. "Relf"  <Usenet@Jeff-Relf.Me> - 2023-09-28 17:34 -0700
    Re: Your motherboard is shot. Physfitfreak <Physfitfreak@gmail.com> - 2023-09-28 23:58 -0500
      Re: Your motherboard is shot. candycanearter07 <no@thanks.net> - 2023-09-29 00:29 -0500
      Re: Your motherboard is shot. chrisv <chrisv@nospam.invalid> - 2023-09-29 06:45 -0500
        Re: Your motherboard is shot. Physfitfreak <Physfitfreak@gmail.com> - 2023-09-29 20:31 -0500
      Pull out your AK-47, aim for the center of the board & fire. "Relf"  <Usenet@Jeff-Relf.Me> - 2023-09-29 06:26 -0700
        Re: Pull out your AK-47, aim for the center of the board & fire. Physfitfreak <Physfitfreak@gmail.com> - 2023-09-29 20:36 -0500
  Re: Flakey Video Output Rockinghorse Winner <Rockinghorse@amgen.com> - 2023-09-30 03:45 +0000
    Re: Flakey Video Output Physfitfreak <Physfitfreak@gmail.com> - 2023-09-29 23:29 -0500
      Re: Flakey Video Output Physfitfreak <Physfitfreak@gmail.com> - 2023-09-30 13:06 -0500
        Re: Flakey Video Output RabidPedagog <rabid@pedag.og> - 2023-09-30 14:10 -0400
          Re: Flakey Video Output Physfitfreak <Physfitfreak@gmail.com> - 2023-09-30 14:26 -0500

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