Black Screen/Will not boot in Safe Mode

Having multiple issues lately, this is the third PC in house to go down this road. Dell Pentium II/We are a not for profit so we use what we have./  All three will not boot up in safe mode only a black screen appears.  Hardware issue or OS issue? could someone please give me a little direction on how to fix the problem.  Thanks in advance.
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CallandorConnect With a Mentor Commented:
No screen with BIOS info or RAM count?

You need to narrow down the focus.  If all three went down close to the same time, then it might be a power problem in the house.  You would then need an electrician to test your outlets.

Otherwise, without any other clues, you will have to take the machine apart and isolate the components.
Some of the things that could be causing your system not to boot up (blank video screen):
- motherboard shorting on case
- bad connection
- faulty or inadequate power supply
- bad RAM
- faulty video card
- bad cpu
- bad motherboard

To troubleshoot this, I recommend stripping down the pc to the bare essentials: one stick of RAM, the cpu, and the video card, and reset the BIOS.  Do not include hard disks, other PCI cards, or other peripherals.
zaradouglasAuthor Commented:
No Bios info no RAM Count, I really mean a black screen.  The three PCs went down at varied times in two weeks.
You'll have to take it apart and strip it down to see if a minimal system works, then.
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