no screen while turning on
when i turn in my laptop it initially turns on with black screen and suddenly automatic turn off with cpu fan
even on charging or battry replacement, ram replacement , direct power supply
The problem remains the same
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Try a full power refresh and check if that resolves the problem.
Here’s the procedure:
Disconnect the charger from the laptop. (if connected)
Open the laptop and disconnect the RTC coin cell battery from the motherboard.
Here’s the hardware maintenance manual for the laptop. Go to p.82 (88 of 114 pdf) in the manual to view the procedure to remove/replace the coin cell battery.
When the coin cell battery is out measure its voltage. If it is <2.5V DC or if the battery is >4-5 years old replace it.
Press and hold the laptop’s Power On button for a full 30 seconds and then release it.
Reconnect the RTC coin cell battery, reassemble the laptop in the reverse order to the disassembly procedure, connect the charger to the laptop and try to start it.
If it starts, there may be a message about the date and time being incorrect. This is normal as the above procedure has reset the BIOS back to its factory defaults. Once the date and time have been adjusted, the message won't appear the next time the laptop is started. Any user defined BIOS settings that have been altered by you to suit your particular requirements will need to be changed back also.
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