Re: Repairing Acer Borg Iibtdl-borg 13057-1m W/ Intel(R) Celeron(R) CPU 1007U
This was of tremendous help. I have a very similar Acer motherboard and the computer had the same issue of no sign of life.
Based on your “solution “ I applied used a hair dryer to heat up the components near the processor.
A few minutes into the procedure, the PC booted up!
Just ordered some replacement caps and will install and report when received.
Thanks
cedward138
Senior Member
Last Activity: 03-29-2018, 05:11 AM
Joined: 07-25-2012
Location: riverdale, georgia
-
Re: Samsung HP-S4253 Y-Main and Buffer
It worked after disconnecting and reseating cables to main and logic boards.
Thanks.Last edited by cedward138; 09-19-2014, 07:50 PM.Leave a comment:
-
Re: SAMSUNG BN96-03252A Vs = 1.6
I removed the logic board and the main board for inspection and saw nothing untoward.
Reinstalled them and voilla1 It works. Perhaps a cable needed reseating.
There are 3 horizontal dotted lines at the bottom of the screen (?dead pixels) but otherwise perfect.Leave a comment:
-
Re: Samsung HP-S4253 Y-Main and Buffer
Got replacement buffer and y-main.
Still no picture!
Please helpLeave a comment:
-
Re: SAMSUNG BN96-03252A Vs = 1.6
The TV is a Samsung HP-S4253 42" Plasma.
Initial symptom was distorted horizontal band at bottom of screen.
Recently progressed to no picture but sound. Examination showed damaged chip on Y-buffer, and 2 failed capacitors on Y-main. Power supply was "donated" to similar tv set while parts were sought.
Since starting this thread, i've done some reading about the site and conducted some suggested test.
By shorting PS-ON to Ground and VS-on to 5.3v, The power supply outputs a Vs of 198.4v (sticker...Leave a comment:
-
SAMSUNG BN96-03252A Vs = 1.6
I gave up on trying to revive the last power supply and opted to purchase another on eBay. Unfortunately, the replacement also has issues.
This one powers up the "Blue Eye", and one even gets the Power-On Chime when the button is pressed. The screen remains dark throughout.
Test values are: measured/sticker
Va = 65 / 65
Vs = 1.6 / 197
Vscan = -7.3 / -185
Vset = 0 / 195
Ve = 3.1 / 110
Disconnecting Y-main and X-main has no effect on the Vs voltage.
Please guide me in getting this one runnin... -
Re: Samsung HP-S4253 Power supply repair
How much stock would you more experienced guys place in this repair kit?...Leave a comment:
-
Re: Samsung HP-S4253 Power supply repair
Pin 1 to pin 2 = 0 v
Pin 3 to pin 2 = 0 vLeave a comment:
-
Re: Samsung HP-S4253 Power supply repair
I'm getting -ve 48 to -ve 56 on pin 1 (fluctuates repeatedly) and -ve 40 to -ve 46 on the other pins. Black lead connected to RTN peg on board.
Found ?transistor on cold side (Q252) with 13.4 v to center pin and 0 v on the other pins. Part number not written or may have 'burned off' the component. no voltages are found beyond this part.Leave a comment:
-
Re: Samsung HP-S4253 Y-Main and Buffer
Ebay vendor informed that the boards will not fit.
Guess have to get buffer with original number and attempt to repair y-mainLeave a comment:
-
Re: Samsung HP-S4253 Power supply repair
I had to remove it to see the part number. I tested it as described while it was out of the board and all test reported "open"Leave a comment:
-
Re: Samsung HP-S4253 Power supply repair
Its KA7815
Btw it was 1 of 2 components that desoldered during useLeave a comment:
-
Re: Samsung HP-S4253 Power supply repair
There is a cap directly in front of it so one of them has to come off to get the number. Just give me a few minutesLeave a comment:
-
Re: Samsung HP-S4253 Power supply repair
Actually, the psu came from the other machine which has sound but no picture. I've started a separate thread for that problem.
What I meant was that I could take voltage measurements at specific components of the working and bad psu for comparison if that would help. Not a board swap.Leave a comment:
-
Re: Samsung HP-S4253 Y-Main and Buffer
There is a listing on eBay for a buffer and y-main from the same model tv but with different pcb/pba numbers as mine.
"SAMSUNG HP-S4253 Y-SUS/ BUFFER LJ41-04211A, (LJ92-01393A, LJ41-04212A)"
Does anyone know if this will work with my unit?
SAMSUNG HP-S4253 Y-SUS/ BUFFER LJ41-03439A / (LJ92-01344A, LJ41-03440A)Leave a comment:
-
Samsung HP-S4253 Y-Main and Buffer
This is 1 of 2 such units I own. It developed a band (approx 10 cm) at the bottom fairly early in its life but otherwise seemed ok.
I turned it on last week and there was no picture but sound was normal.
After reading of similar problems I was motivated to open and examine the set.
There is a blown chip on the buffer board as well as 2 bloated capacitors (1 leaked) on the Y-Main board.
I do not have the level of skill to replace the chip on the buffer even if it is available, so I will be replacing the board.
Is there any reason to believe the Y-main... -
Re: Samsung HP-S4253 Power supply repair
I have a working identical power supply in another tv.
With guidance, I may be able to check corresponding components if that will help narrow down the problem(s)Leave a comment:
-
Re: Samsung HP-S4253 Power supply repair
I set the meter on 1KV and probed various (random) points on the board. Seem to get a range of voltages (5, 15, 18) within the area marked hot but nothing on the cold side.
Hope this sparks some idea for someoneLeave a comment:
-
Re: Samsung HP-S4253 Power supply repair
Resoldering did not breathe new life to the board.
The mosfets read open/infinite between all pins all directions while in circuit.
Though unscrewed from heatsink, mosfets are so firmly bound to it that I'm not sure they will come off in one piece for retesting out of circuit.Last edited by cedward138; 08-18-2014, 12:48 PM.Leave a comment:
-
Re: Samsung HP-S4253 Power supply repair
The K3911 are FET'S according to Google.
Resoldering joints soonLeave a comment:
No activity results to display
Leave a comment: