Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Does the power light on this device stay on even when the computer is turned off?
Document: Not a major issue.The green power light stays on as long as your power supply is on, even though the computer is shutdown. Minor annoyance/feature depending on your perspective.
I bought this to replace an older unit in my desktop computer. I was blown away by the difference in how quickly this reader recognized and mounted any memory card I put into it. I honestly didn't know what I was missing. This device also reads and writes to the various media cards much more quickly than what I was using.
This device replaced an older model 35FCREADBK2 purchased through Amazon which had failed. The manufacturer sent this model as a replacement. It has support for virtually all current card types plus a USB port. It is an excellent addition to a computer which lacks a card reader. It uses one motherboard USB header and can provide simultaneous access between different card types, so items can be copied between different media easily. It mounts in a 3.5" slot which used to be for a floppy drive.
Easy install, mounts flush, WIN 7 finds it and installs the driver, no problems to date reading media, pretty green light.
Installed this in an older PC to replace a dying external memory card reader. I've had no issues with this product so far, works as expected.I gave five stars because the build quality was better than I expected. The case felt more solid than I expected, and the back panel of the case is closed (except for the cable sticking out) for a clean look. There is a green LED that is always on (indicating power?)
When multiple cards are inserted (SDHC + SD, for example), only the first card enumerates as a storage device (one card accessible at a time).
This card reader does the job, no issues upon installation.My unit's USB slot is somehow tight, and makes it tough to plug in a USB drive. It's even tougher to unplug - I have to really pull on the USB stick to get it back. I'm not kidding, it's a minor tug-of-war contest every time. You would think with a standard USB connector this shouldn't be an issue.
Works well with linux. I had problems getting some XDHC readers to work properly. The three I had were causing the kernel's removable media device to crash. This one seems to work just fine.
It also provides a front panel USB slot which is handy.While this is more expensive than some of the alternatives, the 2 year warranty makes the additional cost easier to bear. In my case, the 2 year warranty was good as StarTech replaced the defective device without problem except waiting for the replacement to arrive. I had not realized how much I had come to depend on this device.
I have only had occasion to use it a few times, but it works very well. It was shipped quickly and arrived in good shape. This unit is very easy to install if you have a least a modicum of experience with installing external drives to your computer and hooking things up to your motherboard.
Answer: Is your power LED on or off when the system isn't running.  It will depend on the way your motherboard handles power to the USB ports.  My motherboard allows you to set a jumper to use the +5V rail from the power supply that does go off and on with the system's operation.  The motherboard also allows you to use the +5VSB (the SB means standby) to power the USB ports.  That stays power supply stays on as long as the power supply switch (on the back of the PC) is on and the PC is plugged in.  Some motherboards may not give you this choice.  Check your motherboard manual.  If +5V is powering your USB ports the card reader's LED will be off when the system isn't operating.  If +5VSB is powering your USB ports then the LED will remain on.  Why have a +5VSB?  Well that's to allow your front panel power switch to be a "soft" switch that doesn't switch the full load of your system.  It also allows other components on your motherboard to to powered up when the system is not operating.  That makes it possible for you to wake the system based on the time of day, by taping a key on the keyboard or clicking the mouse.  Those last two require the keyboard and mouse to be getting power all the time.  Today, most keyboards and mice are USB devices so motherboard designers use the +5VSB to power the USB ports if they want you to have the "tap to start" feature.  Too bad they don't let you chose which USB ports operate that way.  I hope that explains it for those who seem to wonder why the other guy is experiencing the power light on or off when the system isn't running.  By the way, a little piece of black tape can hide the LED and others have disconnected the LED on some similar card readers by clipping the LED's power lead.  I haven't cracked this one open to see if that is possible because it doesn't bother me.