Toshiba TV won't turn on after power outage
The weather was beautiful all day -- just the typical Pacific Gas and
Electric service interruption, so it's hard to figure how it could have been zapped with a surge. Something squeals when the set is plugged into the power strip, but that's the only response. Any ideas where to start? Is there likely to be a reset button or blown fuse? It's a Toshiba 27AF43, if that's any help. |
Toshiba TV won't turn on after power outage
On 7/04/2011 12:39 PM, spamtrap1888 wrote:
The weather was beautiful all day -- just the typical Pacific Gas and Electric service interruption, so it's hard to figure how it could have been zapped with a surge. Something squeals when the set is plugged into the power strip, but that's the only response. Any ideas where to start? Is there likely to be a reset button or blown fuse? It's a Toshiba 27AF43, if that's any help. Can't help regarding repairing it, but you could try to find out from Pacific Gas and Electric why the interruption occurred. Surges don't necessarily come from lightening. For example having a high voltage cable break and land on a lower voltage cable could cause one. Whether you'd have any redress against the power company if it turns out there was a surge would depend on your jurisdiction. Sylvia. |
Toshiba TV won't turn on after power outage
On Apr 6, 11:22*pm, Sylvia Else wrote:
On 7/04/2011 12:39 PM, spamtrap1888 wrote: The weather was beautiful all day -- just the typical Pacific Gas and Electric service interruption, so it's hard to figure how it could have been zapped with a surge. Something squeals when the set is plugged into the power strip, but that's the only response. Any ideas where to start? Is there likely to be a reset button or blown fuse? It's a Toshiba 27AF43, if that's any help. Can't help regarding repairing it, but you could try to find out from Pacific Gas and Electric why the interruption occurred. Surges don't necessarily come from lightening. For example having a high voltage cable break and land on a lower voltage cable could cause one. Whether you'd have any redress against the power company if it turns out there was a surge would depend on your jurisdiction. Sylvia. Surges can't come from LIGHTENING, that's what happened to Michael Jackson's face. Surges can come from LIGHTNING. |
Toshiba TV won't turn on after power outage
On Apr 6, 9:22*pm, Sylvia Else wrote:
On 7/04/2011 12:39 PM, spamtrap1888 wrote: The weather was beautiful all day -- just the typical Pacific Gas and Electric service interruption, so it's hard to figure how it could have been zapped with a surge. Something squeals when the set is plugged into the power strip, but that's the only response. Any ideas where to start? Is there likely to be a reset button or blown fuse? It's a Toshiba 27AF43, if that's any help. Can't help regarding repairing it, but you could try to find out from Pacific Gas and Electric why the interruption occurred. Surges don't necessarily come from lightening. For example having a high voltage cable break and land on a lower voltage cable could cause one. Whether you'd have any redress against the power company if it turns out there was a surge would depend on your jurisdiction. A good thought. My local TV repair thinks the high voltage section may be damaged, but won't speculate as to the cost of repair until I bring in this 90 lb set and pay a $25 estimate fee. I found a service manual online that I didn't have to sign my life away to download. There is a fuse, but it is in series with a 1.5meg resistor across the AC input. I measure the ohmmage across the power cord and voila! 1.47 megohms or so. So the fuse is not blown. Can anyone agree that there must be something wrong with the high voltage, and speculate how extensive/expensive fixing it might be? |
Toshiba TV won't turn on after power outage
"spamtrap1888" wrote in message ... The weather was beautiful all day -- just the typical Pacific Gas and Electric service interruption, so it's hard to figure how it could have been zapped with a surge. Something squeals when the set is plugged into the power strip, but that's the only response. Any ideas where to start? Is there likely to be a reset button or blown fuse? It's a Toshiba 27AF43, if that's any help. If the "power strip" mentioned is a battery-powered, uninterrupted power supply (UPS) with surge protection, it may have tripped on the brief service interruption and not properly returned to AC Line power. The squeal may be an alarm that the battery is too weak to provide enough power. Just a thought, since this has been happening to my UPS. Scott |
Toshiba TV won't turn on after power outage
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Toshiba TV won't turn on after power outage
On Thu, 7 Apr 2011 12:00:13 -0700 (PDT), spamtrap1888
wrote: On Apr 6, 9:22*pm, Sylvia Else wrote: On 7/04/2011 12:39 PM, spamtrap1888 wrote: The weather was beautiful all day -- just the typical Pacific Gas and Electric service interruption, so it's hard to figure how it could have been zapped with a surge. Something squeals when the set is plugged into the power strip, but that's the only response. Any ideas where to start? Is there likely to be a reset button or blown fuse? It's a Toshiba 27AF43, if that's any help. Can't help regarding repairing it, but you could try to find out from Pacific Gas and Electric why the interruption occurred. Surges don't necessarily come from lightening. For example having a high voltage cable break and land on a lower voltage cable could cause one. Whether you'd have any redress against the power company if it turns out there was a surge would depend on your jurisdiction. A good thought. My local TV repair thinks the high voltage section may be damaged, but won't speculate as to the cost of repair until I bring in this 90 lb set and pay a $25 estimate fee. I found a service manual online that I didn't have to sign my life away to download. There is a fuse, but it is in series with a 1.5meg resistor across the AC input. I measure the ohmmage across the power cord and voila! 1.47 megohms or so. So the fuse is not blown. Can anyone agree that there must be something wrong with the high voltage, and speculate how extensive/expensive fixing it might be? The squeal is probably coming from the switched power supply with a dead short at one of its outputs. Probably a shorted horizontal output transistor. What caused this transistor to short can be anything from a broken solder connection, or an open electrolytic or hv capacitor, to a shoted yoke or ho transformer. Chuck |
Toshiba TV won't turn on after power outage
On Apr 8, 6:29*am, chuck wrote:
On Thu, 7 Apr 2011 12:00:13 -0700 (PDT), spamtrap1888 wrote: On Apr 6, 9:22 pm, Sylvia Else wrote: On 7/04/2011 12:39 PM, spamtrap1888 wrote: The weather was beautiful all day -- just the typical Pacific Gas and Electric service interruption, so it's hard to figure how it could have been zapped with a surge. Something squeals when the set is plugged into the power strip, but that's the only response. Any ideas where to start? Is there likely to be a reset button or blown fuse? It's a Toshiba 27AF43, if that's any help. Can't help regarding repairing it, but you could try to find out from Pacific Gas and Electric why the interruption occurred. Surges don't necessarily come from lightening. For example having a high voltage cable break and land on a lower voltage cable could cause one. Whether you'd have any redress against the power company if it turns out there was a surge would depend on your jurisdiction. A good thought. My local TV repair thinks the high voltage section may be damaged, but won't speculate as to the cost of repair until I bring in this 90 lb set and pay a $25 estimate fee. I found a service manual online that I didn't have to sign my life away to download. There is a fuse, but it is in series with a 1.5meg resistor across the AC input. I measure the ohmmage across the power cord and voila! 1.47 megohms or so. So the fuse is not blown. Can anyone agree that there must be something wrong with the high voltage, and speculate how extensive/expensive fixing it might be? *The squeal is probably coming from the switched power supply with a dead short at one of its outputs. *Probably a shorted horizontal output transistor. *What caused this transistor to short can be anything from a broken solder connection, or an open electrolytic or hv capacitor, * to a shoted yoke or ho transformer. *Chuck May God bless you Chuck, and your posterity. |
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