Question about Homedics SBM 300H Therapist Select Shiatsu Plus Massaging Cushion SBM300

6 Answers

I have a homedics shaitsu back massager that stoped working

The blue light on the power button flahes on and off

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  • stevenlowell Dec 26, 2008

    I just opened the package. I hear a loud banging like it is jammed. I took the screw out first of course. The light blinks and I cant shut it off once plugged in.

  • cheeseball69 Dec 27, 2008

    I just had the same problem with the SBM-305MH Shiatus Massaging cushion. The twack freed it up and returned it to it's home at the base of your back, but it immediately did the same thing again. The shiatsu and heat mode worked, but it wouldn't roll up and down the back.

    Good thing we bought it from Costco.

  • symond Jan 16, 2009

    i have the same problem, it worked for a few times and now stuck half way with flashing lights, i have tried the thwack method, but no joy for me. unfortunately i bought it in the usa for $100 at costco and am now back home in the UK

  • stevess Jan 27, 2009

    rollers have stopped and the blue light flashes on the hand set, turning off and on or pressing any of the buttons has no effect at all

  • Justin H
    Justin H Sep 10, 2014

    noooooooooooooooooooooooooooooooooooooooooo!!! we all have the same problem, how do I fix the blinking flashing light? Is it just going to blink???? oh man, there goes 100 $ .. booooo


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Give it a good 'knock' on the back (hard surface). You might hear a clink sound. I think it's when a cog gets out of line. My chair is fine now. You'll notice that the rollers start moving back to the off setting. So if it goes off and they are in the middle or top then it's stuck and needs a thwack!

Posted on Dec 19, 2008

  • Scott Adis Feb 20, 2016



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I had the same problem with mine. I got it new & it wouldnt do anything when selecting the mode, it just made a click sound thats it.
I came on here & found where someone said to bang or smack the back of it a couple times & presto the rollers starded doing there thing, so I would recomend this 1st to anyone having a stuck roller or a unit that dosnt do anything after selecting the mode you want.
Its like an old 30's Ford you just gotta beat on it a bit to get it fired up.

Posted on Jan 19, 2011

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Sometimes all kind of electronic products can have problems because of oxidation /or/ moisture after a while , but not direct after buy if some attributes are new then it can have a problem with their timing on gears but also with bad mounted or just bad type of microswitches , or a dirty mode-selectswitch or 1 broken tooth or the worm axle broken on a gear things or solderings that where not good mounted on electrical circuits, only to be shure open the whole equipment so you can see and measure ,find and repair the problem, if you be able to do, but if its a new product and repair is not addressed, no doubt immediately go for another model or brand. or go for money refund thats almost the best remedie
Much kind of shiatsutools can be bought as commercial trash.

Posted on Nov 15, 2016

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My back massager quit working after several years of soothing back rubs. After reading the suggestions here, I tried smacking it a few times to no avail then decided to really "whack" it, after all, I had nothing to loose since it was already broken. I placed it on a throw rug, so as not to damage my floor, and literally slammed the back into the rug a couple of times, plugged it in and voila! My back and I both thank you for this fix.

Posted on Aug 10, 2016

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Power switch does not work .it hasn't woked properly since new, but my husband who used it passed away and I have only just got around to trying to get it fixed who can help me please

Posted on Jan 30, 2015

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I took mine apart and removed the white gear rack that the center contraption uses to move it up and down the back. I then moved the whole contraption down to the bottom and popped the gear rack back in and it allowed it to work again.. but it only goes up to the top and will not come back down. I am thinking the problem has something to do with the electric switch that tells it to reverse.

Posted on Aug 21, 2011

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Posted on Jan 02, 2017

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Ed, dismantle and see what is jammed, get the gear or what you find moving freely and re assemble.
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Power light flashes continuously. No response from the unit other than light on the "wheels" of the messager. Model QRM-400.

Good day!!!

that problem has 2 causes its either power supply board or main board/control.....

please check the power supply...

faulty(leaky/dried) electrolytic capacitor in the power supply section. In the first stage of symptoms warm up will make itself stable and the unit will power up after a few attempt of plugging and unplugging from the outlet but it will get worst, time will come that the unit will not power up at all.

Leaky capacitor has a physical indication of fault like bulged/dome at the top and can be easily identify like in the sample picture below.


Leaky capacitor with dome at the top.

Dried capacitor has no physical indication of fault, you must have a capacitor checker to determine its condition, if not available you should replace all electrolytic capacitor in the power supply section. It will not cost you much because it is one of the cheapest parts on that board.

Click this LINK for more information regarding electrolytic capacitor.

If the power supply is stable and no bulged capacitors...The problem is on the main board..

if the main board is defective,,that is not for D.I.Y because the sensitive parts inside and usually the parts are surface mount type..Please replaced it with the new board..

but before you replaced the board please try to check first the power supply as I first mentioned..
if you have multimeter its better..just check the Vcc 5vdc..if have voltage drop..

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The power led light keeps flashing

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You will need:
1. Roll of electrical tape.
2. Utility Knife
3. A small slot head screw driver OR a pair of needle nose pliers.

The solution is to unscrew the silver ring so that is can be moved up and down. Now, you need to use a utility knife and cut the blue rubber off of the spring. Once you have the blue rubber but off you can see a large spring with another smaller spring inside. Push the head of the ******** till the larger spring's coils are an 1/8 to 1/4 of an inch apart. Next take either the small slot head screw driver or a pair of needle nose and jam the smaller spring back into the hole in the center of the white plastic piece inside of the larger ring. Next plug it in to make sure the vibration is working, reattach the silver piece and tape the larger spring with electric tape.

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