Hi All, my admittedly aging desktop PC won't start today. Everything seems to power up ok, but no power on beep or anything. Seem to recall something like this happening before and replacing the power supply sorted it. Attached is a picture of what is fitted. Anyone know if this will be ok for a straight swap? https://www.amazon.co.uk/JUSTOP-Value-Supply-24-PIN-Floppy/dp/B07HWXRSZ6 Thanks for any thoughts.
Hi Fred Well the place to start is measuring the output volts of the power supply In my experiance I have never had one die on me, Check all connectors are fitted correctly. Does the monitor come on. If so what does the screen say. Or is it that at fault Take care Johnny M
I've had a few fail on me over the years, this is a self build PC but it was a while ago How do I measure output and what should it be. I'd be happy to take a chance and spend £30 on a new one but I'm just dead rusty on how to spec a new supply.
Look for cheapest corsair psu. Its hard to say over web, but cheap psu over the years cause more pc issues than anything
You say it seems to power up... Maybe it's not the power supply but the motherboard, as it seems the POST isn't completing ... I'd try disconnecting anything not essential, optical drive for example, or additional hard drives, or any usb devices. I'd also reseat the RAM and perhaps temp remove any additional cards. Apologies if this is teaching you to suck eggs! Cando
Worked with a guy a good 30 years ago who re-booted the company computer.....from one side of the office to the other wearing size 11 safety boots...needless to say he was instantly dismissed. In his defence lack of training was the cause which lead to frustration and finally BOOM!
Possibly the cmos battery on motherboard? Failure of the battery can cause a blank screen. Had similar earlier in the year with my laptop. My laptop failed to boot, just a black screen. So after checking the power supply was indeed intact, i proceeded with the replacement of the cmos button cell battery on the motherboard. This resolved my issue. Good luck.
Plus 1. Without the battery the BIOS user setting cannot be accessed and it will try going to the basic mode where it may not find the devices like disk drive from where it would normally continue to boot further. Without finding this device it will fail. In worst case, after a new battery has been installed, one may need to access the BIOS to reset the start device sequence.
Thanks for all the suggestions. I have tried reseating the memory and disconnecting non essential devices with no effect. The CMOS battery was changed only a couple of months ago when it wouldn't boot. I have tried holding the button down for ages with no effect. Just to summarise, everything seems to start ok, it just doesn't boot which is normally preceded by a beep or two. They don't happen either. Anyway I've bought a new psu from Amazon that should arrive tomorrow, assuming I've bought one with the right connectors, I'll give that a try. I'm thinking that the probability is that its the MB though so time for the bin maybe.
The C Mos battery being dead would give a message that the boot sector could not be found. Change the PSU.
New psu fitted, no change. This was a fully working PC one day, the next day nothing. Have removed everything non essential, still nothing. Even changed the cmos battery even though, as you say, there would still be something if it was dead. So presumably its MB or CPU? Is there anyway I can establish which without spending more money?
PSU starts all cooling fans run, cpu fan, gpu (fan only, no output), HDD spins up, cd drive works. Pretty sure it used to beep a couple of times as started but nothing now. Can't think of anything else.
Ok so if the hdd spins its getting somewhere...is it windows 10 or later or can you get to the bios normally f2 or del or esc on start.
Ok, its very likely your Motherboard. If yours is old, buy a new CPU and MOBO. You may need new type ram too.
Windows 10 MB: Gigabyte Technology Co., Ltd. GA-MA770T-UD3 CPU: 3.20 gigahertz AMD Phenom II X4 955 BIOS: Award Software International, Inc. F8 10/18/2010 Can't recall exactly how I got to the BIOS, but it was through the keyboard (connected by usb) I know its old but it still did the business for me. No more though I suspect
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