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Benq PB6100 won't turn on...any ideas? - Page 3

post #61 of 116
Thread Starter 
Quote:
Originally Posted by vgl42 View Post

I replaced the blown capacitor and did an inspection of the main board (nothing else seemed blown). Re-Assembled the projector and success! It is working again.

I guess I was lucky that the capacitor blowing didn't take anything else out.

Congrats that's awesome! That's the cap from page one of the thread? From one of the power boards?
post #62 of 116
hey guys, game over for me..., my "dad1000" chip is also dead, this is the chip that receives the 12v from that line where the capacitor blew out. the capacitor blew because of the chip being burned out...,
in sum.. it's garbabe, these chips are nearly impossible to find and even worse to soldier them.

Forget about it!

the end
post #63 of 116
Thread Starter 
Quote:
Originally Posted by DeepSnoozer View Post

hey guys, game over for me..., my "dad1000" chip is also dead, this is the chip that receives the 12v from that line where the capacitor blew out. the capacitor blew because of the chip being burned out...,
in sum.. it's garbabe, these chips are nearly impossible to find and even worse to soldier them.

Forget about it!

the end

What a piece of crap these BenQ's are. I won't be buying them again. The same failure in so many cases....something like 10 on this thread alone. Think of the thousands out there that don't know about this board with the same failure.
post #64 of 116
Wow, Sounds like a lot of PB6100 projectors are failing. I never had any problems with my PB6100. My projector suffered a lot abuse and it still works like new. My projector was been in Iraq for over a year in temps in the 100+ F. I also left my projector in the freezing cold a couple times. ( I accidentally left it in trunk of my car)
post #65 of 116
Hi, somebody have a Picture of a Main Board (or Shematic) of the Benq PB8140, mine has a transistor burn and I can read the model # (just RK) of the transistor. Look in the pictures.

I am not sure it is a transistor or not, but it look like and i think the ID is Q7. Thank You for your help.

sorry for my english...
LL
LL
post #66 of 116
I got it...
post #67 of 116
Thread Starter 
Quote:
Originally Posted by dalmgreen View Post

I got it...

What do you mean you got it?
post #68 of 116
My 6100 just packed it in too. I paid $500 4 years ago and it has seen extensive use so I have got my moneys worth.

Failure mode 1 hour into a movie the screen goes dark, Bulb is off and the fans die!

Let the projector cool, turned it on and there is light , get the Blue Benq logo then bam the Bulb goes off and the fans die!

I was just going to replace it but so close to Xmas I am going to delay purchasing the replacement until January. After reading the form I am motivated to trouble shoot the box and will post on what I find. I have a very strong feeling it's related to the power supply!

Anyone out there using the View Sonic JD6210-3D , looks like a nice step up from the PB6100. Not sure if it would be compatible with the ExpressVu 6141N IRD. I suspect that the YpYrYb output is compatible with the projector but I want to make sure.
post #69 of 116
The capacitor that SyncMaster750b referes to in the post 08-11-08, 09:09 PM Picture 042_resize.jpg isn't blown . The white stuff you see is an adhesive to keep the capacitor in place!

I took my PB6100 apart last night but I wasn't so lucky as to find an obvious component failure. I did clean out the dust, reseat all the connectors and had some success. I fired it up for 40 minutes which is about 38 minutes longer then before. I may have bought some time which is OK. I was a little disappointed that I got it going . 5 years and lots of use on this box, looking forward to upgrading soon!
post #70 of 116
Thread Starter 
Quote:
Originally Posted by ronirwin View Post

The capacitor that SyncMaster750b referes to in the post 08-11-08, 09:09 PM Picture 042_resize.jpg isn't blown . The white stuff you see is an adhesive to keep the capacitor in place!

I took my PB6100 apart last night but I wasn't so lucky as to find an obvious component failure. I did clean out the dust, reseat all the connectors and had some success. I fired it up for 40 minutes which is about 38 minutes longer then before. I may have bought some time which is OK. I was a little disappointed that I got it going . 5 years and lots of use on this box, looking forward to upgrading soon!

I wasn't talking about the capacitor near the upper right, with the white adhesive on it, I was talking about the bulging cap in the center of the image.
post #71 of 116
Another case of blown capacitor. Thanks to your prior discussions, I located and changed the capacitor in question. After that, I got a pale/grey screen like most of you had.

Has anyone of you replaced all the capacitors on the same board? Or, has anyone looked at the parts before and after the blown capacitor? I suspect that this bad capacitor might be caused by the bad part before it or this leaking capacitor might have damage the part after it.

By the way, does anyone out there own schematics of the circuit boards?
post #72 of 116
Same thing here...replaced the blown 470uF cap and now my PB6200 turns on but the screen is all white/grey.
post #73 of 116
Add me to the list of a benq 6100 failure. My problem is similar, if not identical, to ronirwin. Turn the pj on, I get the blue screen but in about 10 seconds, it shuts down and the lamp led on top of the machine goes red. Was using this as a second pj in the basement, so at least my main one isn't lost. But had just hooked up the wii for the kids to use down there on the screen...
post #74 of 116
Thread Starter 
With the white/gray screen issue after replacing the bulging cap...I never tested the component before or after as I don't have the knowledge or tools for it. Other than a visual inspection by a buddy who is a electronics engineer...and he couldn't find anything without some expensive tools as well.

I'm sure that something fried on the mainboard....but until someone with the ability can test it, we will never know. Unfortunately most guys who know how to do that kind of stuff, wouldn't be looking on the message board....they would just fix it themselves.
post #75 of 116
hey guys...

my wife turned my PB6100 last night and I got a green light but no fans, no projection... I searched the internet and came across this site.

Oddly enough, I was JUST replacing caps on my broken LCD monitor.. so i was not suprised to read this. I opened my projector and what do you know... the same exact cap was shot on mine... the exact one!

and it was the EXACT brand/voltage/capacitance as the bad ones in my LCD monitor!

I was all excited, replaced the cap... plugged it in, powered it up and the fans came right on. The projector powered up.. and of course, like you, I got this dingy grey/white screen.

total bummer.


with that said, I had over 3000 hours on the bulb, so the bulb was on its way out... however I would really like to figure this out. I was going to look at it some more today.

sigh...
post #76 of 116
Thread Starter 
Quote:
Originally Posted by martymizah View Post

hey guys...

my wife turned my PB6100 last night and I got a green light but no fans, no projection... I searched the internet and came across this site.

Oddly enough, I was JUST replacing caps on my broken LCD monitor.. so i was not suprised to read this. I opened my projector and what do you know... the same exact cap was shot on mine... the exact one!

and it was the EXACT brand/voltage/capacitance as the bad ones in my LCD monitor!

I was all excited, replaced the cap... plugged it in, powered it up and the fans came right on. The projector powered up.. and of course, like you, I got this dingy grey/white screen.

total bummer.


with that said, I had over 3000 hours on the bulb, so the bulb was on its way out... however I would really like to figure this out. I was going to look at it some more today.

sigh...

I think the cap probably protects something further down the line...once the caps blows....something else does too. Although not exactly sure how caps work. Those caps suck!
post #77 of 116
Wanted to follow up on a previous post. I was having a problem where the benq would start up, stay on or a second or two (blue screen), then shut off with the lamp light blinking.

So I took it apart and checked the caps - didn't see anything overt, put the wires back together, blew some dust out of there, put it back together and now everything seems to work just fine. The bulb stays one without issues.

Just thought I would post in case that helps others in a similar situation.

Oh, and btw, has about 1750 hours on the bulb.
post #78 of 116
Quote:
Originally Posted by DeepSnoozer View Post

hey guys, i told you to stick to this thread as i found the problem
The main system board (the one that connects to the main DLP chip behind the lens, and has the SVGA and SVideo Ports) has a faulty SMT Capacitor too...

Here's the picutres of my mainboard:



after I changed my one cap and got the grey/white screen, i reopened the projector, pulled out my main board, and the same surface mount capacitor was shot on mine.

im throwing in the towel - clearly there is a defect here, and of course everyone's warranty is out.

oh well.

I got 3000 hours out of the bulb - which is more than I should have gotten.
post #79 of 116
Thread Starter 
Quote:
Originally Posted by martymizah View Post

after I changed my one cap and got the grey/white screen, i reopened the projector, pulled out my main board, and the same surface mount capacitor was shot on mine.

im throwing in the towel - clearly there is a defect here, and of course everyone's warranty is out.

oh well.

I got 3000 hours out of the bulb - which is more than I should have gotten.

I took my board apart again, and that SMT resistor doesn't seem blown at all.
post #80 of 116
Same issue here. Walked into the theater the other night and the projector fan was running even though the projector was off. A quick power cycle proved fruitless so a quick search turned up this thread. After a quick tear down of the projector I've confirmed the the same cap is blown on my projector. UGH! It has been a great projector and I've got years of use out of it but wasn't expecting it to die. I think there are only about 1500 hours on the original bulb and I've got a brand new spare that I got via a rebate when I bought the projector.

I'll source a new cap and replace the blown one but am not holding my breath. Anyone in the market for a brand new 6200 bulb?

Brian
post #81 of 116
I am not one to join forums, but this one seems to be one of the most informative and timely ones I've ever seen. You all are incredible. I have a Benq PB6100 as well and last night I went to turn it on and just green lights and no power light. After reading this thread I dug in and found just exactly the same problem parts as all of you were discribing, I'm going to do the work tonight, (wish me luck). I spose Benq has done some reengineering, to bad we were the guinee pigs!
post #82 of 116
well everyone, i guess i had to learn with all of you. I put in the new 470 cap and just like u all, white and grey screen. My resister looks fine on my main video board, so unless there are any other great ideas, i'm going to hang this one up. Its so strange that just like that ....no warning this just went, and yes right after i purchased a new lamp for it. Thanks again for all your help!
post #83 of 116
Wow, this is crazy how many people have had the same exact problem, well, chalk me as another with the same symptoms. I will be opening my projector this weekend to see if it is salvageable. It lasted since 2003, with 2700 hrs, a good life, but not when you consider it was a grand then :/
post #84 of 116
Is have the same problem too.

Replaced the broken cap (the same one)
But now a white screen.
post #85 of 116
Me too.. Same problem here... Same cap... I'll replace it and see if I'm one of the blessed ones.. Hope so, as this economy has me in a state where the idea of buying another projector is a fantasy.... I guess the home theater is now a reading room.. or storage.. maybe I can fix it up real nice for the dog to live in....

This is obviously a chronic issue... BenQ should research this thoroughly and provide us with a list of all possible affected parts to look at/check out, and at least offer us replacement parts (complete boards) at cost or serious discount...

Total bummer.... Football season will never be the same.... :-(
post #86 of 116
Same blown capacitor here. I would post a picture, except that it would look the same as everyone else's! Has replacing it worked for ANYONE?
post #87 of 116
Same story. Came home to throw on a movie, whurring sound coming from the benq, no joy on power down/up, found the forum, popped open the unit, same bulging cap, smt cap is good, will replace 470 cap hoping no white screen of doom.

LoL...will keep you guys posted. If all else fails, I'm taking it out back and will reenact the scene from office space with the fax machine. =D
post #88 of 116
Same story here..same caps is blown , will try tomorrow to replace it .
Just bought a new lamp and no power up..so i did some reading and found this thread..checked the electronic and found the same capacitors is blown.

BENQ PB6200 ( 2004 )
post #89 of 116
same here, the same capacitor:
post #90 of 116
Same problem replaced the capacitor and now have white screen. Did anyone every figure this out? I also noticed the led lights light up a pale green color.
So what we know is the capacitor blows. Wonder if something else is damaged that caused the capacitor to blow?
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