PC Peripherals Noise from PSU and screen flickering after continous usage

Status
Not open for further replies.
G

Gaurish

Inactive
Galvanizer
Hi,

My PSU keeps making weird noises which occurs for some time and then stops, only to start again. while PSU makes this noise, the display on my CRT monitor keeps flicking rapidly making it impossible to work.

the noise quite similar to that of electric insect killer. I am pretty sure its coming from power supply. the cause of problem is unknown but I am pretty sure its not voltage functions as our area has clean power. also I use a UPS to be extra safe.

To double check, I run directly WITHOUT UPS. sound is still there. one thing I noticed is that, it only occurs after prolonged usage like system is powered on for 24hours or more at stretch.This machine is used as downloading box, hence is powered on for weeks at a stretch.

The problem disappears when I turn off the machine and start it back after some time(30-40minutes).

Intel E5300 + Gigabyte G31 mobo

2MB DRR2 RAM

Seasonic II 380W PSU

Numeric 600va UPS

The PSU is under-warranty but can be replaced but I am pretty sure that I would have a hard time explaining the problem to service center guys, as the problem is random.they would simple power-up and say "Sir, its working fine. No problems". I need to reproduce problem infront them but since its random issues, I am able to do so:@

On other hand I am worried. that if the system is in this state, it might fry other components .

Please help me diagnosing the issue:ohyeah:
 
Is the PSU fan workin properly? Check when the noise comes. It might not be spinning and the fan's motor might be giving the buzzing sound.

Also, it might be due to dying capacitors which i have heard make a buzzing noise, though not sure of this.

Try the first and post back.
 
Well i have a similar problem with my psu where the fan makes noise during the first minute of startup. The fan seems to work alright but the noise seems to give warning about that fan . Should i claim for rma for the psu?
 
take out the PSU & use a blower on it from behind & put it back again & try it, if the problem persists then claim for RMA.
 
You ought not have used your PSU/pc in this condition. You should have been alert from the time when you started hearing this noise and monitor screen flickering. Anyway atleast now you realised there is something wrong. Do as malhotra said.

But IMO there most be some issue either with your PSU or with your mobo also. Because if the PSU isnt able to provide constant power to the display, via the motherboard then how come it can deliver power to other components in which case your PC should would have been unstable. But you say only your monitor screen flickers when you hear the noise and no issues other than that . So after blowing with vaccum cleaner, check your PSU on your friends pc, leave it working for 24 hrs and see if the issue persists.
 
Do you have any other PSU?Even a generic one will do as your system requires very less power.Jut swap the PSU for testing purpose and see if the issue occurs again.Run on clean power.
 
Watch carefully at 24PIN ATX plug for sparking. Sometime lose connection make that noise resulting flickering in display. Do check allover for lose connections / Short circuit including wall socket / UPS plugs. Try changing system mains power cable.

If nothing found then try another PSU.
 
  • Like
Reactions: 1 person
Does you connected the CRT from the PSU AUX out or from the UPS out ?

please specify.

ELse check the same by bypassing the CRT power from the PSU AUX to UPS AUX.
So that the PSU can free from some load .

check with another PSU, it seems that the PSU may have some problems,thats why its switching for some initial time (relay), it may be due to some component failure.Please return the same for warranty service.

Also note that the numeric 600Va total capacity is 360W (MAX :Load) so normally with a 17" CRT it will be on 85% total load (+/- 2%).

There is also a chance that the problem may also cause some damages to other parts too.
Please also test the current setup with a LCD monitor( from your friend) and check the problem persists itself,for may reasons its points towards the PSU only.

The main reason is that its not able to currect the initial load during the power on.

please check as given above ,
ie,

1.bypass the AUX power to UPS power (from PSU AUX power)(for CRT)
2.another PSU
3.with an LCD monitor
 
malhotraraul said:
take out the PSU & use a blower on it from behind & put it back again & try it, if the problem persists then claim for RMA.
Click to expand...

Well if that reply is for me then would like to tell this started when i used a blower to blow away the dust from my cabinet.
Also no flickering and other problems for me just the noise when i start for the first time in the day. Temps too seem fine.
So blowing air should solve the problem right?

Edit: Blowing air did solve the problem thanks.:hap2::ohyeah:
 
Thanks for replying. here what I have observed

1) I checked, The PSU Fan is running normally while this problem occurs.

2) I have removed all the power connectors, cleaned the PSU. and put it back. this should rule out any loose connections

3) I don't have another PSU to test. However I do have mecury 300w but has a 20pin connection. so doubt it would fit.

4) judging by kind of sound generated, it seems there is some sparking inside the psu. but I can't see any visible sparks.

5) The problem only affects display - making it unreadable, the rest machine perfectly stable.

6) It occurs only after prolonged usage, like more than 24hours.

I have opened the cabby, so I can see their any sparking inside the cabby.

Regarding RMA,

I would like to replace it but I doubt they would change unless problem exhibits in front of them. I have to make this problem disappear or make it more worse so it can be shown to service center guys.

The only reason I spend 3k on PSU even though my config is entry level was because I wanted to run this machine as "always-on". hence spend on a good quality PSU.

damn, this sucks:( :(

Need your advice people!

amd999 said:
Does you connected the CRT from the PSU AUX out or from the UPS out ?

please specify.
Click to expand...

Power connections of Cabinet and Monitor are separate.
Both of them are connected to UPS's power socket using different power cables.

Monitor does not depend on PSU for its power needs. also I tried running the same without UPS(directly from wall socket). the problem is still there:no:
 
How about recording a video of when the problem occurs at your house? Then show it to the service center guys if you can't recreate it in front of them.
 
  • Like
Reactions: 1 person
you can test with the 20pin mercury PSU too, many boards works on the 20pin too, try the same , and check for the problem.DONT WORRY.

else making many experiments please reomve the PSU for warranty service !.
(it may cause more internal damage to the components too)
 
use a 24 pin converter which will be available for around 50 or 60. I was using it for a couple of years and its fine. Dont use your 20pin psu directly. It may cause problems. Better get a converter..
 
This may sound weird but is your PC in the vicinity of any high tension cables going beneath the wall? It may possibly be producing an interference. If possible move your PC to another location and check.
 
anfjavid said:
use a 24 pin converter which will be available for around 50 or 60. I was using it for a couple of years and its fine. Dont use your 20pin psu directly. It may cause problems. Better get a converter..
Click to expand...

no need for converter.Just leave pin 11,12,23,24.

 
Maybe your psu's switch had gone bad? bad switch can lead to flickering of current and sparking inside the switch.
 
Can you try this:

Interchange the power cables of PSU and monitor or to be safe, get a spare cable from a friend and then try for a day.
Looks like it might be an issue with the cable rather than the PSU. :)
 
Hi,

I have managed to isolate the issue, PSU is the culprit as expected. at random intervals, there occurs some sparking inside the PSU which can be visibly seen as small "white light" under the PCB.

[edit]

I took a video from my phone. quality is not clear but I can see a white light inside. PSU seems fcuked. Nice!

[youtube]ghtkGJtJn8w[/youtube]
 
Dude, this looks like a capacitor burning. RMA time :ohyeah:

Adding the video solution at the end was a good idea gaurish. :hap2:
 
dont experiment with the PSU futher, more damage may occur for inside parts, remove the PSU & rush to your RMA !!
 
Status
Not open for further replies.
Top Bottom