I believe your Question should be "What do I do next?"
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First, please let us know which Blu Phone you have.
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BLU G9
BLU G9 Pro
BLU Vivo XI+
BLU Vivo XI
BLU Vivo 8
BLU Grand M3
BLU C6
BLU R1 HD
BLU Vivo X6
OTHER
...
...
Now, plug the phone in to charge. If there is an indicator telling you it is charging or full, observe that and report it here in your question, by editing your question. Since we are not there, you have to tell us exactly what is happening in order to get our help.
...
If your phone takes a charge, make sure it is fully charged. Then try to turn it on. Then tell us what happened. Exactly.
2 
I believe your Question should be "What do I do next?"
...
First, please let us know which Blu Phone you have.
...
BLU G9
BLU G9 Pro
BLU Vivo XI+
BLU Vivo XI
BLU Vivo 8
BLU Grand M3
BLU C6
BLU R1 HD
BLU Vivo X6
OTHER
...
...
Now, plug the phone in to charge. If there is an indicator telling you it is charging or full, observe that and report it here in your question, by editing your question. Since we are not there, you have to tell us exactly what is happening in order to get our help.
...
If your phone takes a charge, make sure it is fully charged. Then try to turn it on. Then tell us what happened. Exactly.
...
Then we can tell you what to do next.
...
Dave さんによる