Reddit reviews C2G 02902 Mac DB15 Male to VGA (HD15) Female Adapter, Beige

Oh man, get it from Amazon: You Save: $1,605.47 (99%)

It won’t boot to the TV out as default - you’ll need to hook up a conventional monitor to set it up. The video output is compatible with standard VGA monitors, you’ll just need a physical plug adapter like this

You’ll also need an ADB- connector keyboard and mouse. They can be found on eBay.

A few weeks ago I was given this Macintosh IIsi, the operating condition of which is unknown. The system looks to be fairly clean, I haven't been able to spot any signs of major abuse. I purchased a DB-15 to VGA adapter but unfortunately the only VGA monitor I have at the moment does not detect a signal using this. When the machine is turned on it makes pretty normal computer noises including pretty normal hard drive noises. I tried booting with speakers plugged in and I got the standard startup chime (not the sad Mac death chime). I think that implies that everything should be working fine which leads me to believe that the video output/conversion is the issue here. Does that sound accurate? If so before I put down the cash for an era appropriate Apple display, what are my options for converting that video signal to something usable on a modern display or a CRT television? Has anyone had success with displaying this era of mac on modern displays?

Any constructive input is appreciated. Thanks for your time.

If you can't find it here's one pretty cheap:

https://www.amazon.com/C2G-Cables-02902-Female-Adapter/dp/B0002J1JAE

Ah.. that always dupes me. Here is what you need. Db15 to VGA.

Edit: Amazon link

It is a Power Mac 9500/150. The video for that model would be in a PCI slot. It is a 15 pin (DB15) connector which you can use with a VGA monitor with an adapter, something like this.

Edit: you'll also want an ADB (Apple Desktop Bus) keyboard and mouse if you don't already have one. They can be found on eBay.

Here's the adapter I used: http://www.amazon.com/gp/product/B0002J1JAE?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00

IIRC, that's not VGA. Apple used a proprietary DA-15 connector up until around the time the G4 came out. VGA adapters for them do exist.

Try this: https://www.amazon.com/C2G-Cables-02902-Female-Adapter/dp/B0002J1JAE/ref=sr_1_3?ie=UTF8&qid=1541120592&sr=8-3&keywords=db-15+to+vga&dpID=416X4KEsUUL&preST=_SY300_QL70_&dpSrc=srch
I bought one of these for a power mac G3, it seems to work without any dip switches. I got mine as cheap as 9$ w/shipping because it was "damaged" (one piece of plastic was slightly melted, couldn't even notice). Also works with my LC III, so i think unless your model has some known issue with monitor adapters this should work.

Actually, something like this is pretty much all you need to use your new Mac with any PC monitor made in the last two decades that has a VGA port. You will, however, also need an ADB keyboard and mouse.