How to identify and obtain a CPU chip from circuit board?

[Doggonecutsy]

Hi everyone I called my local scrap yard and they said if I remove the cpu chip it is worth between 4 and 20 dollars a pound. I have some circuit boards from the late 80s/early 90s and the scrap guy said they should pop right out. I can't figure out how to get them out or if I am even going after the right one. He said they are most likely covered in metal or plastic. Some of the scrap boards have a silver box on them and I tried popping it out with a flat head screwdriver and it would not budge. Other boards are just filled with square black plastic boxes so on those which one is the cpu chip? It would be a shame to sell the circuit board with the cpu chip still attached.

[miked]

They are all a little different and a little similar. By far the best way to learn is do it. The older the boards generally the more value to the cpu's and boards.

Go to the buyers pages and see if you can figure out which cpu you have and see the rate the buyer is paying.

To get the best price do more reading in the old threads they really do help.

Start here: https://www.scrapmetalforum.com/e-wa...dentification/

Start with the first "sticky" thread by PartTimeScrapper it is a gem. I am personally grateful for his contributions to the forum. His generous sharing has helped me make a business out of my recycling. 73, Mike

[JJinLV]

The first few videos show how and should help you identify which is the cpu. https://m.youtube.com/results?q=remove%20cpu&sm=3

[JJinLV]

I had a longer reply but miked already covered what I was gonna and better!

[jeb1212]

Do you have motherboards from computers or just random circuit boards?

Circuit boards from old VCRs, radios, stereos, TVs and other noncomputer equipment do not have CPU chips.

Newer digital circuit boards may or may not have a CPU chip.

That silver box sounds like a TV tuner on a VCR board.

[Doggonecutsy]

I have 8 motherboards from older computers from the late 1980s/early 1990s and I also have the circuit boards from the hard drive and floppy disk drive as well as one from a printer, a label maker and a scanner.

[DiamondN]

If you're able to post a couple pictures of what you have, that would be really helpful...

[JJinLV]

If you're able to post a couple pictures of what you have, that would be really helpful...

Helpful and fun! I love old circuit boards!

[eesakiwi]

I have 8 motherboards from older computers from the late 1980s/early 1990s and I also have the circuit boards from the hard drive and floppy disk drive as well as one from a printer, a label maker and a scanner.

There should be CPU on the Motherboards, in the case of 80's/Early 90's motherboards, I expect them to be 'Purple Ceramics'.
The exception is Apples/Macs and 'Slot processors', where the CPU is on a separate board that plugs into a slot on the Motherboard.

Google image CPU to see later model CPU, a bit more searching will give you pics of older larger CPU. Purple ceramic, green fibre, brown fibre, black fibre(glass fibre- fiberglass) with a little rectangle (that's the actual CPU chip) in its centre.
The pins will all be Gold plated pins.

[Doggonecutsy]

How do I put pictures on the forum from my computer?

[miked]

Go to the first page of the forum at the bottom of this page look for the section "SMF Support Forum". Open it up and the first section is on photos.



As you can see there are several "sticky" threads, I suggest you and others who haven't read all the sticky threads do so. Even in the sections you are not currently interested in because there is a lot of over lap. 73, Mike