The screen on my Mac pro just flashes but will not come on?
My MacBook Pro will not come on. The screen just flashes. Can it be a problem with the battery?
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Could be. Start with If your Mac battery won't charge - Apple Support.
- Be sure you're using the correct power adapter and cable: Find the right power adapter and cable for your Mac notebook - Apple Support. I added the emphasis because it's frequently overlooked.
- If your MacBook Pro is an older model that uses a power adapter with a MagSafe connector, please read Apple Portables: Troubleshooting MagSafe adapters.
If it still will not turn on, proceed with If your Mac doesn't turn on.
Read and follow each of its steps, including all the links within it, all the way through and including Step 4, which directs you to:
If your Mac starts up to a blank screen
Read and follow each of it steps also, all the way through and including the end, which takes you to:
"If you still need help, please contact Apple Support."