iMac 21.5" - power up chime but no sound once OS is loaded

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • survivalbloke
    Badcaps Veteran
    • Aug 2021
    • 293
    • United States
    #1

    iMac 21.5" - power up chime but no sound once OS is loaded

    Have a 21.5" 2013 iMac here. Did a RAM upgrade and the oddest thing, we can't get any sound after it's booted. So Youtube, etc, nothing. We do get the startup chime though. In sound properties, all we see is the digital output. Did a little reading to discover possibly inserting a 3.5mm headphone into the jack would trip it back off the digital setting but that's not the case it seems. The headphone jack is verified connected to the logic board.

    Any insights?
    Tags: None
    • reformatt
      Badcaps Legend
      • Feb 2020
      • 1408
      • Australia
      #2
      Re: iMac 21.5" - power up chime but no sound once OS is loaded

      PRAM reset?

        Comment

        • Robertronik
          New Member
          • Jun 2025
          • 1
          • Mexico
          #3
          I had the same problem, I solved it by checking that the headphone jack flex cable was connected correctly, I had mine a little popped out on one side, so I had to make sure I clicked it on there nice and snugg, and my problem was solved, sound is back and at 100%

            Comment

            Previous template Next

            Related Topics

            Collapse
            • nickgronk
              iMac PowerPC G4 very low sound • Sunflower Model
              by nickgronk
              Just picked up an iMac powerpc for $1 at auction. changed pram. This is working. Problem, barely any sound. I have everything cranked up in software, reset nvram/pram - nada. I do get sound ONLY if I plug in a powered speakers in headphone port. I do not get the startup bong.
              I get almost no sound with normal headphones. I mean, you can barely hear it. Took the board out and by eye found these 2 inductors broken. Not sure if they are for sound. Speaker is also plugged in and I tried a normal pc speaker in its place - still zilch. Are these inductors the culprit?
              I cannot find any schematics...
              08-05-2024, 07:04 AM
            • ChaosLegionnaire
              what i went through dealing with my mobo with dead onboard sound!
              by ChaosLegionnaire
              so i took out one of my spare gigabyte ep35-ds3r mobos from storage for use to do some cpu, ram and video card testing of stuff i bought from ebay and got for free from momaka. he bought 50 e8400 cpus for cheap from ebay some years ago and i decided to help him relieve him of some of his supply since he had waaaay too many!! what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol!

              i had to blow some dust off the board and heatsinks with the datavac as i didnt clean it up before putting it in storage. after finishing...
              09-13-2022, 09:02 AM
            • Comp_Pro
              Macbook Air 820-00165 Static Chime Sound
              by Comp_Pro
              Hello all,

              I have a weird issue to solve here. This macbook air came in showing a black screen even though the backlight was lit. The display was not the issue as I tried another known good display. Upon trying to restart it, sometimes it boots up but freezes at the login page. More commonly however, the macbook will give the chime sound but then get stuck repeating the sound. The first chime sound is normal but the subsequent chimes sounds are crackly. Voltages seem normal, no liquid damage. I did find a blotch of something near one of the crystals on the other side of the CPU...
              11-02-2023, 03:23 PM
            • LEECH666
              Grundig Vision 9 37 9880 T USB (Chassis SR) TV Repair Help - Distorted Subwoofer Sound and overall weird sound waveforms
              by LEECH666
              Good day ladies and gentleman!

              I am currently trying to repair a Grundig Vision 9 37 9880 T USB LCD TV for a friend that has a weird audio problem. Basically everything works fine except for the heavily distorted sound when the Subwoofer module is connected and there is a buzzing sound coming from the PSU PCB.

              This seems to be a rather rare TV so there is not much prior on topic help to be found however a service manual is available at the usual sources (Electro Tanya i.e.).

              I think the PSU buzzing comes from one of the coils near the bridge rectifier but...
              01-19-2024, 05:46 PM
            • moritz1992
              iMac 27" Retina 5K i5 3.2Ghz no chime, no display, LED 1 and 2 on
              by moritz1992
              Good evening guys, im new to this forum and searched around it to find a way to fix my broken imac 27 retina late 2015. Logic Board is 820-00292-A
              Here´s the problem :
              After i changed the blade ssd with an NVME SSD and accidentially bent some cpu socket pins (managed to get them straight up again, one pin broke but seems to be N/C) while trying to get some fresh thermal paste, i hear no chime and have no display. LEDs 1 and 2 are green but 3 and 4 not. I did some measuring and it seems that gfx_ok, is ok but dp_ok, is not okay. Checked some caps and diodes in circuit but everything...
              11-04-2023, 06:25 PM
            • Loading...
            • No more items.
            Working...