Dell Inspiron 1564 dead

Greetings
First excuse me for my bad English
Please advice
I disassemble my laptop to clean the processor fan According to the instructions of dell support guide
I have assemble again ,but it didn't work
No signal
No lights
With battery and without
DEAD

Regards
 
There is bound to be one of the interface connections that did not make good contacts. Trust me it is very difficult to make sure all interface connections are all properly seated in their connector.

I recently worked on a Notebook that had five separate boards inside and if any one of them was disconnected or wasn't properly seated, the machine would not boot.
 
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