Here's the [link|https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/t540p_w540_w541_hmm_en_sp40a26003_03.pdf|hardware maintenance manual] for the laptop.
Start at the beginning and go through it and check that all the removable components and cables are connected correctly.
Once that is done and you are satisfied that all is correct, ''before attempting to turn on the laptop,'' try a power refresh and check if that resolves the problem.
Here's the procedure:
-
Remove the charger from the laptop (it shouldn't be connected anyway during you're previous checks)
+
Disconnect the charger from the laptop (it shouldn't be connected anyway during you're previous checks)
Remove the main battery from the laptop (this also should be removed when doing you're checks).
Disconnect the RTC coin cell battery from the motherboard. Go to p.69 of the manual to see how to do this. When this battery is out, measure its voltage. If it is <2.5V DC or is >5 years old, replace it. Search online for ''02K7078'' to find suppliers that suit you best.
''Press and hold the laptop's Power button for a full 30 seconds and then release it.''
Reconnect the RTC coin cell battery, reassemble the laptop, reinsert the main battery, connect the charger and check if it turns on OK.
FYI this is what Lenovo has to say about a 4 beep error code:
Four cycles of four short beeps - Turn off the computer immediately and have the computer serviced.
Here's the [link|https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/t540p_w540_w541_hmm_en_sp40a26003_03.pdf|hardware maintenance manual] for the laptop.
Start at the beginning and go through it and check that all the removable components and cables are connected correctly.
Once that is done and you are satisfied that all is correct, ''before attempting to turn on the laptop,'' try a power refresh and check if that resolves the problem.
Here's the procedure:
-
Remove the charger from the laptop (it should be connected anyway during you're previous checks)
+
Remove the charger from the laptop (it shouldn't be connected anyway during you're previous checks)
Remove the main battery from the laptop (this also should be removed when doing you're checks).
Disconnect the RTC coin cell battery from the motherboard. Go to p.69 of the manual to see how to do this. When this battery is out, measure its voltage. If it is <2.5V DC or is >5 years old, replace it. Search online for ''02K7078'' to find suppliers that suit you best.
''Press and hold the laptop's Power button for a full 30 seconds and then release it.''
Reconnect the RTC coin cell battery, reassemble the laptop, reinsert the main battery, connect the charger and check if it turns on OK.
FYI this is what Lenovo has to say about a 4 beep error code:
Four cycles of four short beeps - Turn off the computer immediately and have the computer serviced.
Here's the [https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/t540p_w540_w541_hmm_en_sp40a26003_03.pdf|hardware maintenance manual] for the laptop.
+
Here's the [link|https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/t540p_w540_w541_hmm_en_sp40a26003_03.pdf|hardware maintenance manual] for the laptop.
Start at the beginning and go through it and check that all the removable components and cables are connected correctly.
Once that is done and you are satisfied that all is correct, ''before attempting to turn on the laptop,'' try a power refresh and check if that resolves the problem.
Here's the procedure:
Remove the charger from the laptop (it should be connected anyway during you're previous checks)
-
Remove the main battery from the laptop (this also should be disconnected when doing you're checks.
+
Remove the main battery from the laptop (this also should be removed when doing you're checks).
Disconnect the RTC coin cell battery from the motherboard. Go to p.69 of the manual to see how to do this. When this battery is out, measure its voltage. If it is <2.5V DC or is >5 years old, replace it. Search online for ''02K7078'' to find suppliers that suit you best.
''Press and hold the laptop's Power button for a full 30 seconds and then release it.''
Reconnect the RTC coin cell battery, reassemble the laptop, reinsert the main battery, connect the charger and check if it turns on OK.
FYI this is what Lenovo has to say about a 4 beep error code:
Four cycles of four short beeps - Turn off the computer immediately and have the computer serviced.
Hi @downtoeart61562
Here's the [https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/t540p_w540_w541_hmm_en_sp40a26003_03.pdf|hardware maintenance manual] for the laptop.
Start at the beginning and go through it and check that all the removable components and cables are connected correctly.
Once that is done and you are satisfied that all is correct, ''before attempting to turn on the laptop,'' try a power refresh and check if that resolves the problem.
Here's the procedure:
Remove the charger from the laptop (it should be connected anyway during you're previous checks)
Remove the main battery from the laptop (this also should be disconnected when doing you're checks.
Disconnect the RTC coin cell battery from the motherboard. Go to p.69 of the manual to see how to do this. When this battery is out, measure its voltage. If it is <2.5V DC or is >5 years old, replace it. Search online for ''02K7078'' to find suppliers that suit you best.
''Press and hold the laptop's Power button for a full 30 seconds and then release it.''
Reconnect the RTC coin cell battery, reassemble the laptop, reinsert the main battery, connect the charger and check if it turns on OK.
FYI this is what Lenovo has to say about a 4 beep error code:
Four cycles of four short beeps - Turn off the computer immediately and have the computer serviced.