very strange question
I ahve installed a lot of diferent modchips.
And don't have any problems , but recently I instaled one bluechip on brand new SCPH 39004 model made in china. I didn't test it before installation and after I the installation proces I turn on PS2 and cd tray didn't open , I put the another chip and it's opens after that I put the old chip and it's again opens I reassemble it and it works after 3or 5 minutes its again goes to the red light and after that cd tray won't open anymore even without a chip.
So could modchip hurt PS2 like this way , or it was a spoilage product?
I forget to tell that after that I installed that to modchips to another PS2 and their working fine now.