Attempted to upgrade RAM and add Hard Drive now system won’t boot.

[kobomb]

Hello, I was trying to upgrade the RAM and hard drive on this HP Pavillion Desktop and now I am not able to start the machine up. It won’t even bring me to any type of error screen. I only hear three slow beeps followed by two quick ones. I even set the original RAM back in its slot but the beeping still persists.

[BeemerBiker]

You didn't identify your system and the beep codes do not match any here   If the board is made by some 3rd party (like asus) then their beep codes must be used.

The problem is either the ram, or the video board if there is one.

Did you reset (clear the cmos)?

In any event, the old ram should work.  Use compressed air to blow out any dust that might have fallen in the ram socket.

If you have built in graphics then pull the video card out.  Just use one memory stick, try both sockets. Make sure memory stick is clean and use one of those big pink erasers to clean any tarnish or finger oil from the gold edge.

HEH

[Prométhée]

Hello

[start]
This is an automatic response
in order to avoid writing the same thing each time

Some elements may therefore not apply to you 
To be able to answer you effectively, we need some information

we need the exact model of your computer, and the product number
To find it follow this
for a desktop computer

HP Desktop PCs - How Do I Find My Model Number or Product Number? | HP® Customer Support
and for a laptop
HP Notebook PCs - How Do I Find My Product Name or Number? | HP® Customer Support

Give the full name with the product number P / N

this is not a model:
HP Desktop M01-F1xxx
the requested product number must look like this
Product Number: 9EE50AA # ABA
the model corresponding to this number will therefore be
HP Desktop - M01-F1033wb

Give the full version of windows

for windows 10 type winver in the search box
if you give the best information
your problem could have a solution more quickly (depending on the difficulty, of course)
Learn how to use the Community

Advice for asking the "Very Best Question"

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The given document is maybe incorrect

From what you indicate, the code should be indicated the other way around
that would be 2 long, then three short?
otherwise, it has virtually no connection in the documents
this being personally I do not understand what they mean here
In general

This document is for HP and Compaq Desktop computers.

If your computer does not start, light emitting diodes (LEDs) or beeps can help identify the issue. The following information describes the flashing light and beeping error codes and how to resolve the problem.

Specific patterns of long and short blinks along with long and short beeps (where applicable) identify errors. The blink/beep sequence indicates the type of error:

• The red LED blinks to represent the major error category (long blinks).
• The white LED blinks to represent the minor error category (short blinks). For example, ‘3.5’ indicates 3 long red blinks and 5 short white blinks.
• 1 second pause occurs after the last major blink.
• 2 second pause occurs after the last minor blink.
• Beep error code sequences occur for the first 5 iterations of the pattern and then stop.
• Blink error code sequences continue until you unplug the computer or press the power button.

hardware

3.2

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

Indicates potential memory failure. Reseat memory. Correct memory configuration (correct DIMM placement and size/type matching). Test with known good memory. Replace affected component.

BIOS

2.3

The embedded controller policy requires the user to enter a key sequence.

Follow any prompts given. If issue persists, attempt Sure Start recovery.