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Repair information for the HP EliteBook 840 G3. This Hewlett-Packard laptop is designed for enterprise usage.

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( it actually a elite desk 800 g3 mini 35w

watch this and if need more detail let me know also I have used jumper too

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Hi @braydentoolman ,

Pictures may be worth a thousand words but not if you can't understand too well what is being said and also getting seasick watching it.

In a few words, what is the problem?

par

Ok so I’m start as a self taught teen repair for electronics and I did a teardown and when I was done and tried to turn it on it beeps 3 red long and 2 white short

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Hi @braydentoolman ,

According to the maintenance and service guide (see p.103) a 3:2 error code says:

Hardware 3.2 The embedded controller has timed out waiting for BIOS to return from memory initialization.

Basically you have a memory problem, which you probably already know.

Hopefully you haven’t been removing/replacing the memory module with the power still connected to the PSU as this could have damaged the memory module.

I can’t tell from the video but how many memory modules are there?

If there are two ram modules try installing only 1 ram module in slot 1 (lower one) and then check if it passes POST (Power On Self Test). If no good try the other ram module and check.

It won’t work if there is only 1 module and it is inserted into slot 2 i.e. the upper slot.

Remember to disconnect the power from the PC when changing the ram. Also check that the module contacts are clean etc.

If there is only 1 ram module try to reset the BIOS and check if that works. Disconnect the power from the PC and then remove the coin cell battery from the motherboard (note the orientation of the battery- usually it is +ve on top as marked on battery). Then press and hold the PC’s Power On button for a full 30 seconds and then release. Reinsert the coin cell battery and reconnect the power to the PC and turn it on.

If it does turn on successfully then there may be a message saying that the date and time are incorrect. This is normal as the BIOS has been reset. Once you correct it it won’t show again.

If it doesn’t work then you may have to get another compatible memory module just to check if it is the problem or if there is a problem with the motherboard.

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Yes well I tried module form other computer and now I need to get a new system board for that to so I think in need to get new motherboard

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This error also occurs when a cpu is changed, as it did in my circumstance. Unsure if the cpu is faulty, or if the motherboard needs something else doing to accommodate it. CMOS was reset using every option - power disconnected and power button held in, cmos reset button held down, all peripherals removed etc etc. Reinstalled old working cpu and pc worked again.

Checked cpu was compatible with HP and it was.

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Brayden B sera éternellement reconnaissant.
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