Member Avatar for mjohn030

change memory from 256 to 512 and now pc will not boot,put old mem. back in and still no boot-help help help

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Short summary and build-on: reported the machine stopped posting after changing RAM. Replies from , , and pointed at memory and slot issues. The checklist below avoids repeating those basic tips and gives safe, practical next steps and diagnostics to narrow the fault without causing further damage.

First, confirm compatibility and configuration. Verify the exact memory type the SR1300nx requires (DDR vs DDR2, unbuffered vs registered, voltage and module density) from the service label or HP support documents before trying other sticks. If you only have mixed or unknown modules, obtain one correctly‑specified stick first. Do not change voltages or timings beyond the motherboard/RAM specs — only documented BIOS changes are safe.

Second, perform non-destructive hardware checks. Power down, unplug, and discharge the system. Clear CMOS (remove the coin cell for several minutes or use the reset jumper per the manual). Inspect the DIMM sockets and surrounding board for bent contacts, scorch marks or bulging electrolytic capacitors. Try a minimal bench test on a non-conductive surface with only CPU, one known-good compatible RAM stick, and power supply to see if the board will POST.

Third, isolate the power system and recovery options. Verify the PSU rails with a multimeter or PSU tester, or swap with a known-good PSU if available. If the board still will not POST, remove the hard drive to preserve data and consider booting the drive in a USB/SATA adapter for recovery. If visual checks, CMOS reset, and a known-good compatible module fail to restore POST, the motherboard or DIMM slot hardware is likely damaged and professional repair or board replacement is the next step.

Cautions: use ESD precautions throughout, avoid random voltage increases in BIOS, and label any suspect module so it is not reused until tested.

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Member Avatar for Suspishio

... and in the other orum section I replied:

A long beep is usually a RAM problem. As you've tried the original RAM, it is possible that there is a common cause fault on both RAM sticks. Like zapped by static electricity. Or not seated proerly (unlikely for 1 long beep).

Member Avatar for loki_

this could be caused by the 512mb that may of been faulty and then when you inserted the memory it damaged the the ram slot! have you tried in a different slot? can you test the 256 in a nother pc to make sure its still working? bothe the chip dont work and a nother chip does not start up the pc then the motherboard is damaged(it happens). but do not place the 512 in to a nother pc until you are sure that it is the the source of the problems!

Member Avatar for ahihihi...

Try setting ram voltage manually.. 1.85, then 1.9, then 1.95 and see if the ram in black slots will boot at all..

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