HP Laptop ZT3210EA does not boot, power LED, HDD LED are continuously ON and CPU fan stops after 5 seconds.

AKLAL · Apr 2, 2015

This Laptop has not given any problem since 2003. Today I left the Laptop on for one hour and when I returned I could not awake it from sleep mode. I shut it down by pressing power button and tried to boot it again. When I press the power button, I can see the CPU fan moving for few seconds and then fan stops, HDD moving sound also heard, Power-on LED, HDD LED and WIFI LED all LED turn continuously ON with green light. Laptop LCD screen does not display any thing. I have tried the following troubleshooting.

1) Removed power cord, and then removed battery, HDD and all USB connected devices.
2) Did hard reset by pressing power button for 30 seconds
3) Tried booting but still no boot.
4) removed ram and tried booting without ram. all symptoms remained same.
5) tried booting with one memory bank alternatively but still problem remained same. I have checked HDD on another laptop and found it OK.
6) Yesterday I had downloaded and installed batterycare application to monitor the battery health. I have some doubt if this software having main exe file as unins000.exe could have messed up the laptop BIOS.
I had also put the speaker off before this problem occurred, therefore I can't hear any beep sound after pressing the power button on.

I had also contacted the nearest HP service center but they refused to look at the problem mentioning that the machine is out of warranty and too old to get parts from HP
.
Kindly help me by suggesting what else I could do to troubleshoot it if it is possible at all.

Im Spartacus · Apr 2, 2015

The next thing to try is your memory it could be fried or dead? it might be dirty contact. If the contact edges look dirty you can use the rubber off a pencil to gently clean them or watch a you tube video for guidance on cleaning PC memory modules. Remember if the memory is working you might fry it with static from you body so try not to make contact with component or contact parts? hold it by its edges. You might be best finding a dry copper water pipe before touching the memory ground your self by holding / touching it to remove any static charge from your body then commence checking it.

You can test if the screen it dead by plugging it into a external monitor VIA the

http

/upload.wikimedia.org/wikipedia/commons/9/92/SVGA_port.jpg
You may have to press fn key and/or a Function key on the top row of you laptop to display to screen. Look at the symbols on you laptop keys.
Good luck sounds like it served you well.

AKLAL · Apr 5, 2015

Im Spartacus :

I did as you have suggested.
1) Reinserted the memory banks and tried to boot. still no boot. repeated it four time with no difference.
2) Attached external vga monitor and tried to boot, Pressed fn key along with f4. no display on external monitor.

I am suspecting that even keyboard is not responding. Let me again repeat what I have observed after pressing the power button.

- CPU fan moves to few seconds and then stops. I don't understand what the fan moving indicates. Is fan controlled by BIOS and CPU.
- CPU remains cool as if not doing any thing. Why there is no heating of CPU if its working.

- There are no beep sounds from speaker. I had put the speaker off to avoid boot noise. Can it be because of this that speaker is not giving any sound.

- Power switch LED lights up green and stays glowing. no blinking.
- HDD LED lights up green and stays glowing. no blinking. Why HDD light is ON?
- WiFi LED lights up and stays glowing. no blinking. Why WiFi Light is ON?

- Capslock and numeric padlock LEDs don't light up. No blinking either
- Pessing capslock key has no effect on capslock LED. Is it because keyboard is yet not activated as there is no boot process started.

My guess is that keyboard is not responding because boot process is not starting due to the following reasons.
- RAM modules are dead
- Major component on the motherboard has failed
- CPU is dead

I am trying to get the memory modules tested on other laptop. kindly suggest me if I can do something on my own. I have the maintenance manual that describes the dissembling and other tasks.

Im Spartacus · Apr 5, 2015

Even if the keyboard was dead something should be displayed to screen and external keyboard could be used to test this anyway. Possible causes are bad ram, fried motherboard, CPU or on-board GPU? One more thing is how good was you battery if old and not so good the power lead could be at fault as it maybe trying to charge a dead battery but not supplying enough voltage to boot the laptop. Power supplies charging and power circuits are separate one could fail making you think it working. Get some one to check it out for you if you can.or find someone with a laptop lead same specification polarity, output voltage and high enough amperage as yours to test it.

AKLAL · Apr 8, 2015

Finally I could find a shop experienced in chip level repair work and got it working. I was told that video chip had been replaced. The technician was not willing to tell me further details. For me it costed just $10 as service charge.

However, I am grateful to Im Spartacus who took interest and tried his best to help me.

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HP Laptop ZT3210EA does not boot, power LED, HDD LED are continuously ON and CPU fan stops after 5 seconds.

AKLAL

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Im Spartacus

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Im Spartacus

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