no POST - bad RAM

ludwig1977 · Nov 21, 2013

Hello!

I connected a second HDD and since then no POST. I discovered the cause is RAM. when I change the RAM there is everything normal. when I install the bad RAM on a second identical motherboard there is no POST. is the RAM still usable??? is it burned? how can I know?

Supahos · Nov 21, 2013

So wait you're saying the computer worked fine, you pluged in a 2nd HD, and now your ram doesn't work? what did you hit them with when trying to install the HD?

Okay couple of things to try... one reset your bios (unplug computer, remove battery, wait 45~60 seconds, hit power button, reinstall battery, plug up comptuer, start computer) its possible you ended up with some sort of weird bios setting when messing with the HD, but most likely the ram was damaged in some way during the HD install.

ludwig1977 · Nov 21, 2013

I tried that. also I did install the RAM on a second identical motherboard and still no POST. when installing the HDD I did remove the RAM and reinstalled it.

PassMark · Nov 21, 2013

If the RAM did work in the motherboard and now doesn't work in either the original nor in a new MB, then it is toast. Just throw it out. There is no fixing the RAM stick.

This assumes that you correctly seated in the RAM in the slot, the contacts aren't dirty and you haven't plugged them back into the MB in a configuration the MB doesn't like.

Tradesman1 · Nov 21, 2013

Try each stick individually in slot 1, was the computer on when you plugged in the HD, and if so was it a hot swap able port?

Supahos · Nov 22, 2013

Additionally I don't know what brand your ram is but several manufacturers have lifetime warranties, inspect the stick closely, if you see nothing bent and nothing burnt they very well may replace them under warranty. (well you have to ship them to the MFG on your own dime)

ludwig1977 · Nov 26, 2013

Tradesman1 :

the compter was NOT on when I did plug in the HDD. it is possible that the power supply was overloaded because 2 HHDs (it is 400 W). after testing each stick individually on slot A1, the computer did boot and did recognize the sticks. I have 4 identical sticks. when plugging in all 4 sticks there was NO POST again.

Motherboard ASUS P5L 1394
http://www.asus.com/Motherboards/P5L_1394

Memory KINGMAX KLDC28F-A8KB5 512 MB DDR2-800

Tradesman1 · Nov 26, 2013

The may be a little starved for voltage, may want to raise the DRAM voltage + 0.10 and the NB voltage + 0.075

ludwig1977 · Nov 28, 2013

Tradesman1 :

thank you for reply!

what is NB?
the specifications of the manufacturer said 1.8 V for DDR2. it was set in BIOS to AUTO. I did set it up manually to 1.8 V and NO POST. you say I should set to 1.9 V? there is no danger?

Tradesman1 · Nov 28, 2013

DDR2 is normally safe through 2-2.1 and the NB on 775 mobos is the voltage that controls the MC (memory controller) which is in the mobo chipset (NB) rather than in the CPU as it is in current CPUs

ludwig1977 · Nov 29, 2013

Tradesman1 :

I did raise the voltage of DDR2 to 1.9 V. I do not find the setting for NB voltage (I am not a profesionist). please, if you can see the user manual from this link and advise me, I would be greatful:
http://www.asus.com/Motherboards/P5L_1394

when booting, there is no display (black screen) but the monitor led is blinking green. first one long beep and then 3 short beeps. I think windows is loaded because I see HDD activity (red led blinking). I do not know what to do now.

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no POST - bad RAM

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