My computer is Dead

[boskey]

I have a Lenovo M72z all in one which is 4 years old, updating from Lenovo and everything froze, on waiting a few minutes I unplugged waited the usual minute, restarted the LED light came on and nothing except for one long buzz and then every 5 seconds 2 beeps occur until I unplug.

 

[Megahertz07]

Was it updating BIOS?

 

[fireberd]

This is what Lenovo shows for two beeps.

parity error, the first 64KB memory chip encounters parity failure. In CMOS settings, set memory ECC check to "DISABLED" and the problem is resolved. However, it is better to replace the memory

 

[boskey]

Hi, thanks but I cannot get in to my computer keyboard/mouse does not speak to the computer.

 

[fireberd]

That is all Lenovo shows for the two beep error code.

You can try to reset the CMOS memory (BIOS) and see if that helps. However with an all in one, which is like a laptop, the CMOS backup battery (CR2032) is probably not easily accessible. The back would probably have to be removed to access the battery. If you are able to access the battery, with the PC power disconnected (off), remove the battery for 10 minutes. Reinstall and see if it works or at least able to access the BIOS.

Another possibility, if there is more than one memory module installed, remove the first module and see if works.

Otherwise, it will have to be taken to a qualified repair technician.

 

[Lance1]

If you decide to disassemble the unit this will give you some knowhow Lenovo ThinkCentre M72z Hardware Maintenance Manual

 

[boskey]

dead as a dodo

thanks i have all this i have changed battery computer still the same but a different buzzer sequence 3 short 1 long.

 

[Megahertz07]

3 short and 1 long beeps = DRAM memory error

With the PC power cable disconnected (off), remove the memory modules and gently clean the contacts with alcohol and a clean cloth. Don't use paper. Let it dry well. Insert the modules back. See if it works.

If it doesn't, try one module at a time. They must be removed or inserted with the power cable disconnected .

 

[boskey]

Hi one and all, done what you have said I have only got (1) one module in this model, I would add I do have the fan and Ethernet working, blank screen no keyboard tried others but no go. thanks.

 

[Megahertz07]

No more beeps?

 

[boskey]

Yes I have still got beeps three (3) and one (1) long.

 

[Megahertz07]

Did you clean the memory as I instructed?

 

[boskey]

YES

 

[Megahertz07]

I would say that you have a failed memory.
My suggestion is to take to a repair shop or to an authorized Lenovo dealer.

 

[boskey]

Thanks for all your feed back, the problem will be now is finding one that doesn't rip me off.

 

[Megahertz07]

All symptoms indicates a RAM failure, but it can be something else.
You can buy a RAM, same type (DDR2, DDR3?) with equal speed or higher.
If you want some help, give us your RAM code.