lenovo ideacentre AIO 730S-24IKB beeping on startup

Hello, I have the exact same PC and it has started doing this as well. I have found that if I unplug the unit for a few seconds, then plug it back in, it will normally boot correctly. But if I do a restart from Windows, I get the beeps and a black screen and boot not completed. Have you found a solution for this?

No not really. Since that time I took it to Best Buy where I bought it and they put in some new memory or something and sent it back to me but it still did it intermittently. Then I had someone come out from a local computer repair shop and he did a few things but was not able to recreate the problem. It was all right for a while but just this week it started doing it again and this time with a black screen. Yesterday I had to turn it off and turn it back on three times before I could get it to work. I was also having another problem with the computer completely shutting down, the light on the monitor and the keyboard remained lit up. I read about disabling the windows 10 fast startup so I did that and that solved that problem. Now I wonder if that is causing the black screen problem on startup.

Things have gone worse for me. Unplugging the PC before rebooting no longer works. But I may have another workaround. After the beeps, the message “Display not detected” is displayed. I’ve tried plugging something in the HDMI input port (a Chromecast dongle, but a laptop may work). When I reboot, I still get the beeps. But if I press on the Input Selection button (next to the HDMI port), the screen (initially black) switches from Monitor Mode (showing the Chromecast home screen) and with another press to PC mode (showing the Windows lock screen). This has worked for me twice. I haven’t tested further as getting the PC to boot has been more and more difficult and I don’t want to reboot unless I really have to.

I have since updated my PC with the new driver released on Jan 8 by Intel for the UHD Graphics 620 display adapter and now my PC appears to boot normally. Note that I used the Intel Driver and Support Assitant to find this update. Lenovo utilities did not propose this update at the time I did it.

I have the same issue with a customers computer. the computer would work, then not work, then work again. If it went to sleep or turned off the display (power save) after so many minutes, it would not turn back on. Id have to pull the plug. Then i got the beeps starting. Then id unplug it and plug it in and it would work again.

In trying to fix it, it stopped working all together. Id hear the beeps, i would wait a while then hear it make the windows log in sound. Thats when i knew it was booting but nothing on the screen. I took a laptop with HDMI and made sure it was outputting to the screen. You hit the button on the back of the screen and it switches between the internal pc or a external source. I took a flashlight and shinned the light into the screen and i can see windows from the laptop but there is no backlight. Basically the pc is fine but the backlight on the LCD went bad. So its basically trash. Either change the entire screen or buy new.

This was also a clean install of windows i just did on it. Also swapped ram before i knew this as well. Seems like a common issue with this. It wouldnt have anything to do with windows drivers as the above person said because it (the beeps) happens before boot. That is a hardware issue. The answer below that says most helpful is not the case in my situation either because the computer boots and we know it boots because i hear the windows sound. I could be possible the onboard video went as well but seeing there is no backlight I know that is an issue. This happens on laptops from time to time as well.

Im going to show this in a you tube video that i hope to post soon. You can search with the model.

Hope it helps. -Mike-