No beep, no vid at any point, but most everything else seems to be running. Num Lock does come on and stays on if not turned off, at power up.
I’m not sure there even is an internal speaker - if there is, it’s well hidden. Could be some tiny thing on MB, I suppose, but this machine has 7.1 Dolby built into the MB.
It’s the power supply. The power supply is like the liver of the computer. It has +12 volts, - 12 volts, + 5 volts, - 5 volts. Even 3 volts. Look at all those wires. 16. to the motherboard, 4 to each hard drive, and then there’s the wires to the video board. If any of them has a cold solder joint or a blown capacitor behind it, it won’t put power everywhere that it is needed. I’ve had power supply issues before. The computer fans turn on and some lights flash and it is really hard to imagine that the power supply is faulty. This is why I don’t build my own computers. I only buy used ones and only Dell. I have right now 4 dell desktop computers and 7 dell laptops. I bought a desktop brand new at Costco and the rest from Goodwill stores. I have had used and gotten rid of at least a dozen Dell computers that I bought previously owned from thrift stores.
Q: What does POST mean? A: POST is a way to send hard copy messages from one location to another. >BZZZT< Wrong! POST means Power On Self Test. It’s been that way since the first days of computers. The last thing of a POST is the ASCII control-g character also known as Bell. It is simulated by computers as a beep since they don’t actually have bells in them. If you don’t get a beep then the computer has not passed the POST. If it doesn’t pass the POST it will not boot. Booting is done by BIOS which is short for Basic Input Output System. You can’t enter the BIOS until you pass the POST. Changing RAM may cause additional beeping which tells you that RAM is not your problem.
From here on, if you choose to ignore my diagnosis, you will not be using that computer except for the exercise in futility which I suppose has its own value. I would have said screw it already.
Good luck.