Hisss.. Sound from Power supply
I have a Dell computer but it gives a "hissss..sound" and Horizontal lines running through screen. ..i did'nt see bulging capacitors in power supply.
Any idea in these?!
Any idea in these?!
-
If the only tool you have is a
hammer, you tend to see
every problem as a nail... -
Re: Hisss.. Sound from Power supply
Something is definately wrong with the supply, usually the caps. If it's "BS powersupply" throw it out the window and buy a new one. But even still if you want to repair it, buy a new one if it's a BS stock one.
I had a Zalman PSU, it hissed and by swapping all the caps (which still looked fine) it started to work. -
Re: Hisss.. Sound from Power supply
What brand of caps are in the PSU?Muh-soggy-kneeComment
-
Re: Hisss.. Sound from Power supply
Horizontal lines through the screen is usually a video card or monitor failure. Maybe the PSU is malfunctioning and damaged the video card, or maybe it's a 2nd unrelated fault that it hisses. Was the system working fine then both problems occurred simultaneously?Comment
-
Re: Hisss.. Sound from Power supply
I had a hissing/buzzing sound and horizontal line jitter (the screen rippled slightly) when the primary caps in a cheap ass power supply failed.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Hisss.. Sound from Power supply
^ That brings up an important distinction, is the screen unstable as-in jittery lines, or are there steady lines across it Hatibu?Comment
-
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
Hello Everybody,
Trying to repair a power supply from a Russound CA4 Multizone Controller (picture attached)
Russound no longer supports it but were kind enough to provide a schematic of the power supply (pdf attached).
The outputs marked 12v and 20v are all measuring only 1v.
The board is clicking, which I think means it is in something called hiccup mode when the flyback transformers switches because of an internal problem or something else on the board Overloading it.
The capacitors physically look clean (no bludgesor leaks) and... -
I have a 15 - inch Retina MacBook Pro from the mid - 2014 model. Here is the link: https://www.badcaps.net/forum/showth...light=820-3662 . The battery broke some time ago. After I removed the battery and plugged in the original power adapter, the MBP could boot up normally. However, when I checked with IntelPowerGadget, I found that the CPU speed was limited to 0.8 GHz, and it ran very slowly. Later, I found a solution on GitHub. There is an open - source project called cputune that can set the CPU running speed. So I can now run the MBP at full speed. But another problem...
Comment